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Author Information: Adam Riggio, Royal Crown College,

Riggio, Adam. “Belief in a Weird World: A Review of Bernard Wills’ Believing Weird Things.” Social Epistemology Review and Reply Collective 8, no. 3 (2019): 1-5.

The pdf of the article gives specific page references. Shortlink:

H. P. Lovecraft’s creation, Cthulhu, is one of the world’s most famous symbols of the weird.
Image by Chase Norton via Flickr / Creative Commons


Weird is a strange word. The idea of weirdness itself is rather strange, as suits the subject I suppose. Bernard Wills has written the essay anthology Believing Weird Things, in part, to explore what weirdness is. The book itself, however, is rather weird. Or at least, it’s weird to an academic audience.

Let me explain. While I write quite a few book reviews for SERRC, over the last while, the amount of time between my receiving a review copy and actually writing and submitting the review of the book has lengthened from a flexible to a messianic duration. So my reviews often end up being informed by other reviews of the same book, where others have gotten around to it before me.

So this review is also, though in small part, a rebuke to Matthew Dentith’s earlier review of Believing Weird Things published late last year.[1] Although it remains far from perfect, Wills has written a book that is both challenging and accessible to a wide audience. Believing Weird Things is a popular book of philosophical thought, in the tradition of Bertrand Russell’s public philosophical essays. For some audiences of researchers, a book of that character may be too weird to understand at first.

What Is Weird? The Weird? Weirdness?

Whether something is weird is not a matter purely of ontology. There is no weird in itself, since weirdness is a relational property. Something is weird only in comparison to something else, relative to surroundings, wider environments, or the expectations of people regarding those surroundings and environment.

Weirdness is most fundamentally an epistemological concern. When a sudden disturbance appears in the smooth flowing of a natural process, that disturbance is simply disruptive and destructive. We as self-conscious observers may call it weird, but regarding the process and its disruption in themselves, there are matters of fact alone.

Science-fiction and horror literature has probed the nature of weirdness in more nuance than many philosophical arguments. The weird unsettles expectation, which creates an immediate fear and a profound fear. Speaking immediately, a weird encounter is a sign that presumptions about the reliability of the world to sustain your own life are in doubt. That causes fear for your life.

The more profound fear of the weird inspires is that, more than just your life being at risk, the fundamental nature of reality is at risk. It would be extremely dangerous to encounter creatures like the Shoggoths of Lovecraft’s “At the Mountains of Madness,” one of the stories that helped forge the genre of weird fiction, but their nature is weird enough such an encounter would call into doubt everything you believed about reality itself.

To be weird is to have a character or nature that is such an anomaly for your expectations of how and what the world is, as to be unnerving. A natural process cannot be unnerved, only a self-conscious subjectivity. What is, is; what is weird must be understood as weird.

Weirdness, therefore, is in the eye of the beholder. At least that’s what I would say if I were disposed to cheap clichés. Different people with different histories, cultures, moral and aesthetic values will consider different things weird.

The Relative Relativity of Weirdness

Wills himself describes it well in his essay on Rastafarian religious beliefs, one of the best in the volume. Rastafarianism is a Caribbean religious minority, its people marginalized in the faith’s Jamaican birthplace. The religion’s cultural influence far outshines its size because of the global fame and historical influence of Rastafarian musicians in reggae, such as Bob Marley, Peter Tosh, and Lee Scratch Perry.

But to someone raised in a generally Christian culture, some Rastafarian beliefs are genuinely strange, even though much of the religion is a clear outgrowth of the Abrahamic tradition. The Rastafarian Jah is the same God as Islam, Christianity, and Judaism. Rastafarianism recasts the Jewish concept of the chosen people to refer to all Africans who suffered from colonization and the Atlantic slave trade, their Exodus being the ongoing process of decolonization. Like Islam, the moral principles of the religion incorporate rituals of worship into everyday social life, and it roots those moral principles in the shape of world history.

Rastafarian parallels with Christianity are, as Wills and I agree, rather weird. Rastafarianism has a Messiah figure that operates according to the same metaphysical principles as Christ. Haile Selassie I, Ethiopian Emperor from 1930 to 1974, is the living incarnation of God for Rastafarians.

I use the present tense because Rastafarians hold that Selassie is alive in some form, despite his 1974 assassination in Ethiopia’s communist uprising. In all seriousness, I expect there eventually to be a theological schism in Rastafarianism over how to reconcile their faith with the fact that Selassie was murdered and his body stuffed under the toilets of a palace bathroom, discovered decades later, long after that palace had been converted into government offices.

I can talk about this with an air of humour, as though I’m joking from a position of relative privilege at the expense of Rastafarianism and Rastas. The detachment that allows me to dehumanize Rastafarian culture with this smirking bemusement is rooted in my attitude toward the faith: it is alien, a culture I know only through song lyrics and cultural stereotypes. I find the Rastafarian faith’s messianism weird, but only because I was not raised a Rasta or near any Rastafarian communities.

In Wills’ best essays, he uses these extended philosophical case studies to uncover the epistemic, political, and moral implications of who considers what weird, and why.

Bernard Wills - Believing Weird ThingsA Disjointed Path to Its End

The only real problem I have with the book is that not all of its essays are as good as its best. If I can use terms that more often describe albums, Believing Weird Things is a little front-loaded. The book is divided roughly in half. The first essays explore weird ideas and beliefs as a philosophical historian building a book of fascinating case studies. The second half of the book describes different ways in which weirdness has been weaponized, how difference and strangeness become no longer guides to fascinating places, but targets to be destroyed.

If I can take a couple of examples to illustrate what I mean, consider this. The best essay in the first half of Believing Weird Things is “Why I Am Not a Rastaman.” The best essay in the book’s second half is “Portrait of an Islamophobe.”

Yet I don’t want to linger too long on praise for the actual best essay in the volume, where Wills insightfully and incisively identifies the dynamics of racist discourse that show how Islamophobic ideology merges the dehumanization of colonial racism with the paranoia and massification of classical European anti-Semitism.

That’s all I really need to say other than that “Portrait of an Islamophobe” alone is ethically worth your buying Believing Weird Things at its affordable price, expressly for the purpose of rewarding Wills with one more purchase in his next royalty payment.

So when my biggest critique of a book is that some essays aren’t as good as others in an essay collection, you can be pretty sure that I don’t have a significant problem with what he’s doing. Believing Weird Things ends with two essays that originally appeared in earlier forms at SERRC, two analyses of the nationalist turn in Western conservatism.

Those essays offered quality insights on the true nature of conservatism as a tradition of English political philosophy whose classical works were the landmarks of Thomas Hobbes and Edmund Burke, and how the nationalism that dominates today’s right wing itself betrays many of the principles of those great thinkers.

However, they make for an odd fit with the other essays of the book, all of which explicitly experiment with our concept of the weird to develop a new philosophical insight. These last two essays are fine in themselves, but as they appear in Believing Weird Things, they amount to filler tracks that stand apart from the main themes and style of the book.

Misunderstanding the Will to Weirdness

My last point is a soft rebuttal to Matthew Dentith’s earlier review of Believing Weird Things. I couldn’t help but find Dentith’s critiques a little off the mark, since they were rooted in a conception of the weird that Wills didn’t share. This conception of the weird is rooted in Forteana, the study and archiving of generally weird and strange phenomena, rumours, objects, folklore.

There are two central organizing concepts in the work of Charles Fort, as he first developed his project and how it has continued since. They are anti-systematicity and skepticism of skepticism. Fortean catalogues of weird things and events make no attempt to understand these departures from the norm as expressions of some underlying order. This is anti-systematicity, which parallels skepticism of skepticism, the refusal to doubt that something exists or occurred merely because its existence contradicts or is contrary to established knowledge.

Any system of knowledge based on these principles of anti-systematicity and skepticism of skepticism will regularly produce weirdnesses, because if you hold them, you will accept without much trouble radical departures inductively valid expectations about what is and is not possible. But these principles do not exhaustively define what is weird or what weird is. Fortean epistemology is openness to the weird, but does not itself define that which is weird. Dentith’s analysis of Wills’ work conflates the two.

But Dentith’s error is a learning opportunity for us in who the best audience for Believing Weird Things would be. Dentith’s misinterpretation flowed from his prior experience in academic research. Earlier in his career, the study of Forteana and the works of Michael Shermer, particularly his 1997 Why People Believe Weird Things, was important to his intellectual development.

In the introduction, Wills frames his own Believing Weird Things as a response to Shermer’s arguments from the end of the last century. Dentith critiques Wills for having chosen an apparent interlocutor from more than 20 years ago, seeing this as an attempt to restore Shermer’s ideas to a place in contemporary philosophical debates in the spheres of academic publication. But Wills never justifies such a restoration in his own book. Indeed, Wills never refers to Shermer in as much detail in the rest of the book as he does in the introduction.

Such a use of Shermer appears sloppy, and I do think Wills should have been a little more explicit in explaining the role that Shermer’s work plays in his own thinking. A figure who plays such a major role in an introduction, but disappears throughout the main body of the book makes for poor academic writing.

But Wills’ only mistake here was having given Dentith the opportunity to make his own mistake. Wills does not aim to restore Shermer to some more prestigious position in academic philosophical debates. Engaging with Shermer’s ideas has a more personal meaning for Wills, because a chance encounter with Shermer’s work was the inspiration for a trilogy of books that explore the nature of weirdness, of which Believing Weird Things is the second.

Wills refers to the work of Shermer to invoke him as an inspiration for his in-progress trilogy. Invoking an intellectual ancestor is not a reason that can inspire most academic writing, especially that based in paywalled research journals. Dentith did not understand this aspect of Believing Weird Things because he kept his analysis inside the context of the academician’s writing.

Conclusion: Life Is Weird

Bernard Wills has written a book for a general thinking audience, a contribution to the social and ethical antidotes to rouse the red-pilled from their dogmatic slumbers. Believing Weird Things asks readers to re-evaluate what they consider reasonable and strange, that weirdness is a category without a simple definition or clear boundaries.

Contact details:


Dentith, Matthew R. X. “Between Forteana and Skepticism: A Review of Bernard Wills’ Believing Weird Things.” Social Epistemology Review and Reply Collective 7, no. 11 (2018): 48-52.

Wills, Bernard. Believing Weird Things. Montréal: Minkowski Institute Press, 2018.

[1] Okay, that makes me sound way, way too late.

Author Information: Nadja El Kassar, Swiss Federal Institute of Technology,

El Kassar, Nadja. “A Critical Catalogue of Ignorance: A Reply to Patrick Bondy.” Social Epistemology Review and Reply Collective 8, no. 2 (2019): 49-51.

The pdf of the article gives specific page references. Shortlink:

Image by Lynn Friedman via Flickr / Creative Commons


This article responds to critiques of El Kassar, Nadja (2018). “What Ignorance Really Is: Examining the Foundations of Epistemology of Ignorance.” Social Epistemology. DOI: 10.1080/02691728.2018.1518498.

Including Bondy, Patrick. “Knowledge and Ignorance, Theoretical and Practical.” Social Epistemology Review and Reply Collective 7, no. 12 (2018): 9-14.

Thanks to Patrick Bondy for these inspiring comments that allows me to further explain the arguments and rationale of the integrated conception of ignorance. 

Weak and Strong Ignorance

Bondy’s suggestion that there is weak ignorance and strong ignorance just as there is strong and weak knowledge is very interesting and perceptive (Bondy 2018, 11-12). But I take it that this distinction is more relevant for defenders of the propositional conception of ignorance, in particular supporters of the Standard View and New View.

In my reply to Peels (2019), I suggest that we should not see knowledge and ignorance as simple opposites, nor that their accounts should be mirrored. And in the original article I have argued that the Standard View and the New View are not adequate for capturing ignorance. Therefore, Bondy’s suggestion and the related criticism of the debate between the Standard View and New View is not as pertinent for my integrated conception of ignorance, but I think it should be taken seriously as an alternative approach to distinguishing forms of ignorance.

“Agential Ignorance” and “Agential Conception of Ignorance”

I need to point to a terminological issue in Bondy’s reply that may be central for distinguishing conceptions of ignorance and particular instances of ignorance, and thus also for motivating and defending the integrated conception of ignorance: Bondy swiftly changes between “agential conception of ignorance” and “agential ignorance” and seems to use these terms interchangeably. Similarly, for “structural conception of ignorance” and “structural ignorance”.

But these terms are importantly distinct: the former refers to a conception or an approach, the latter to a form of ignorance, or also particular instances of ignorance. In my article I only discuss agential conceptions and structural conceptions and I do not use the terms “agential ignorance” or “structural ignorance” because I am specifically interested in conceptions of ignorance

Practical Ignorance

Bondy, like Peels, points out that I do not address lack of practical knowledge or lack of know-how. Again, I fully agree that this is an open question in my article and for the integrated conception and I look forward to addressing this question in more detail. In his reply, Bondy suggests that my integrated conception can be extended to apply to such “practical ignorance” in the following way:

Theoretical ignorance: this would remain as El Kassar formulates her integrated conception of ignorance, as “a disposition of an epistemic agent that manifests itself in her beliefs – either she has no belief about p or a false belief – and her epistemic attitudes (doxastic attitudes, epistemic virtues, epistemic vices)”

Practical ignorance: a disposition of an agent that manifests itself in her actions – where S fails to φ, or S does not φ well or properly – and her practical attitudes (ethical and pragmatic attitudes, ethical or practical virtues and vices). (Bondy 2018, 13)

Yet, I have to reject this charitable extension. Bondy, as well as Peels, is right that there is work to do in this field, but simply imposing the integrated conception on “practical ignorance” would not be appropriate, nor is it an approach that I would wish to take.

First, I doubt that we can simply replace epistemic attitudes, virtues and vices with practical attitudes, practical virtues and vices to cover the practical case. Second, I think we need to respect the highly-evolved debate about know-how and include their concerns and arguments in any account that wants to address the lack of know-how or lack of practical knowledge. Any further conclusions require starting communication between the different fields and debates – a genuinely exciting prospect for philosophy of ignorance!

A first step might be to examine the terminology that we are using: Bondy discusses “practical ignorance” but maybe the term “incompetence” is more apt for these practical cases? Interestingly enough, psychologists who work on ignorance and meta-ignorance sometimes frame ignorance in terms of incompetence, see, for example Dunning in describing the Dunning-Kruger-Effect (Dunning 2011, 260).

Finally, and more fundamentally, I do not see why one should go for a unified account of theoretical and practical ignorance that uses the same components for both forms of ignorance. As I explain in my reply to Peels, I think that one should not aim for a unified account of ignorance and knowledge but instead take the phenomena seriously as they are. For now I take the same considerations to hold for theoretical ignorance and practical ignorance.

“We Can Say Everything That We Want to Say About Ignorance”

Bondy claims that “we can say everything we want to say about ignorance” (Bondy 2018, 9) with the propositional conception. But his claim is based on the assumption that what I call constituents of ignorance really are just causes of ignorance and I hope that my clarificatory remarks in this reply and my reply to Peels’ contribution explain why the assumption is not warranted and why the propositional conception does not say enough about ignorance. Let me briefly return to some arguments to motivate my position:

One problem is that Bondy’s (and Peels’) interpretation of closed-mindedness and other virtues or vices as causes of ignorance makes it seem as if these virtues and vices are naturally efficient causes; i.e. they turn the original claim that epistemic virtues and vices are co-constituents of ignorance into the claim that they are efficient causes.

But I would like to hear more about why we should draw this conclusion or why it is warranted. Again, a parallel in philosophy of know-how may be helpful in that context: know-how as a disposition does not explain why a performance occurred, it explains “why a certain kind of act … is possible in the first place” (Löwenstein 2017, 85, emphasis in original). And, similarly, a disposition, like open-mindedness or closed-mindedness, does not explain why someone does not know that p or why someone is ignorant of that particular fact. We need events in the world, decisions, beliefs, and motivations and the like to explain why someone is ignorant.

Second, as I say in the article, ignorance is more than a doxastic issue, it also has an attitudinal component, how one is ignorant – not how one has become ignorant, but the particular character of one’s ignorance. That also involves more than saying what kind of ignorance (e.g. propositional ignorance or practical ignorance) the particular instance belongs to. There is another facet of ignorance that is constitutive of ignorance and it cannot be captured by the propositional conception since it is restricted to the doxastic component.

That is why I want to say more about ignorance than just refer to the doxastic component. And even more, I suggest that everyone who wants to capture actual instances of ignorance should want to say more about ignorance than the propositional conception does.[1]

Contact details:


Bondy, Patrick. 2018. “Knowledge and Ignorance, Theoretical and Practical.” Social Epistemology Review and Reply Collective 7 (12): 9–14.

Dunning, David. 2011. “The Dunning–Kruger Effect.” In Advances in Experimental Social Psychology, 44:247–96. Elsevier.

Löwenstein, David. 2017. Know-How as Competence: A Rylean Responsibilist Account. Studies in Theoretical Philosophy, vol. 4. Frankfurt am Main: Vittorio Klostermann.

Peels, Rik. 2019. “Exploring the Boundaries of Ignorance: Its Nature and Accidental Features.” Social Epistemology Review and Reply Collective 8 (1): 10–18.

[1] Thanks to David Löwenstein and Lutz Wingert for helpful discussions.

Author Information: Eric Kerr, National University of Singapore,

Kerr, Eric. “On Thinking With Catastrophic Times.” Social Epistemology Review and Reply Collective 8, no. 1 (2019): 46-49.

The pdf of the article gives specific page references. Shortlink:

Image by Jeff Krause via Flickr / Creative Commons


Reprinted with permission from the Singapore Review of Books. The original review can be found here.

• • • •

On Thinking With – Scientists, Sciences, and Isabelle Stengers is the transcription of a talk read by Jeremy Fernando at the Centre for Science & Innovation Studies at UC Davis in 2015. The text certainly has the character of a reading: through closely attending to Stengers’ similarly transcribed talk (2012) Fernando traverses far-reaching themes – testimony, the gift, naming, listening – drawing them into a world made strange again through Stengers’ idea of “thinking with” – as opposed to analyzing or evaluating – notions of scientific progress, justice, and responsibility.

All this will make this review rather different from convention. I’ll attempt a response, using the text as an opportunity to pause, regroup, and divert, which, I hope, will allow us to see some of the connections between the two scholars and the value of this book. I read this text as a philosopher within Science and Technology Studies (STS) and through these lenses I’ll aim to draw out some of the ideas elaborated in Fernando’s essay and in Stengers’ In Catastrophic Times.

Elusive Knowledge

Towards the end of the essay, Fernando muses on the elusive nature of knowledge: “[T]he moment the community of scientists knows – or thinks it knows – what Science is, the community itself dissolves” (p.35). He consequently ties epistemological certainty to the stagnation, or even the collapse, of a scientific community.

In this sense, Fernando suggests that the scientific community should be thought of as a myth, but a necessary one. He implies that any scientific community is a “dream community… a dream in the sense of something unknown, something slightly beyond the boundaries, binds, of what is known.” (pp. 35-36) Further, he agrees with Stengers: “I vitally need such a dream, such a story which never happened.” So why? What is this dream that is needed?

Stengers suggests that we are now in a situation where there are “many manners of dying” (2015, p. 9). Any attempt on “our” part to resolve the growing crisis, seems to merely entrench and legislate the same processes that produced the very problems we were trying to overcome. International agreements are framed within the problematic capitalocene rather than challenging it. Problems arrive with the overwhelming sense that our current situation is permanent, political change is inertial or even immovable, and that the only available remedy is more of the poison. Crucially, for Stengers, this sense is deliberately manufactured – an induced ignorance (ibid. p. 118).

Stengers’ concern, which Fernando endorses, is to reframe the manner in which problems are presented. To remove us from the false binary choice presented to us: as precaution or pro-action, as self-denial of consumer products or geoengineering, as deforestation for profit or financialization of forests. For his part, Fernando does not offer more solutions. Instead, he encourages us to sit in the mire of the problem, to revisit it, to rethink it, to re-view it. Not as an act of idle pontification but for what Stengers calls “paying attention” (ibid. p. 100).

Paying Attention to Catastrophic Times

In order to pay attention, Fernando begins with a parental metaphor: Gaia as mother, scientific authority as father. For him, there is an important distinction between power and authority. Whereas power can be found in all relations, authority “is mystical, divine, outside the realm of human consciousness – it is the order of the sovereign. One either has authority or one doesn’t” (p.21).

Consequently, there is something unattainable about any claim to scientific expertise. The idea that authority depends on a mystical or theological grounding chimes with core epistemological commitments in STS, most forcefully advocated by David Bloor who argued that the absolutist about knowledge would require “epistemic grace”.

Alongside Fernando’s words, Burdock details gooey, veiny appendages emerging from pipes and valves, tumours and pustules evoking the diseased body. Science and engineering are productive of vulnerable bodies. Here we might want to return to Stengers’ treatment of the pharmakon, the remedy/poison duality.

For Stengers, following Nietzsche’s gay scientist (whom Fernando also evokes), skepticism and doubt are pharmakon (Nietzsche 1924, p. 159). She details how warnings as to the dangers of potential responses are presented as objections. STS scholars will note that this uncertainty can be activated by both your enemies and your friends, not least when it comes to the challenges of climate change. This is the realization that prompted Bruno Latour to issue what Steve Fuller has called a “mea culpa on behalf of STS” for embracing too much uncertainty (Latour 2004; Fuller 2018, p. 44).

Data and Gaia

Although there is little mention of any specific sciences, scientific instruments, theories or texts, Fernando instead focuses on what is perhaps the primary object of contemporary science – data – especially its relation to memory. It is perhaps not a coincidence that he repeatedly asks us to remember not to forget: e.g. “we should try not to forget that…” (p. 11 and similar on p. 17, 22, 21, and 37). He notes that testimony occurs through memory but that this is, generally speaking, unreliable and incomplete. His conclusion is Cartesian: perhaps the only thing we can know for sure is that we are testifying (p. 16).

Stengers picks up the question of memory in her dismissal of an interventionist Gaia (to paraphrase Nick Cave) denying that Gaia could remember, could be offended or could care who is responsible (2015 p.46 and fn. 2). She criticizes James Lovelock, the author of the Gaia hypothesis, for speaking of Gaia’s “revenge”. While he begins his text with Stengers’ controversial allusion to Gaia, Fernando’s discussion of data also has a curious connection to a living, self-regulating (and consequently also possibly a vulnerable) globe.

Riffing on Stewart Brand’s infamous phrase, “information wants to be free,” Fernando writes, “[D]ata and sharing have always been in relation with each other, data has always already been open source. Which also means that data – sharing, transference – always entail an openness to the possibility of another; along with the potentiality for disruption, infection, viruses, distortion” (p.22). Coincidentally, along with being an internet pioneer, founding one of the oldest virtual (and certainly mythological) communities, Brand is an old friend of Lovelock.

Considering these words in relation to impending ecological disaster, I’m inclined to think that perhaps the central myth that we should try to escape is that we don’t easily forget. Bernard Stiegler has suggested that we are in a period of realignment in our relationship to memory in which external memory supports are the primary means by which we understand our temporality (2011, 2013).

Similarly, we might think that it is no coincidence that when Andy Clark and David Chalmers proposed their hypothesis of extended cognition, the idea that our cognitive and memorial processes extend into artefacts, they reached for the Alzheimer’s sufferer as “Patient Zero” (1998). In truth, we do forget, often. And this is despite, and sometimes even because of, our best efforts to record and archive and remember.

Fernando’s writing is, at root, a call to re-call. It regenerates other texts and seems to live with them such that they both thrive. The “tales” he calls for spiral out into new mutations like Burdock’s tentacular images. But to reduce Fernando’s scope to simply a call for other perspectives would be to sell it short. Read alongside In Catastrophic Times, the call to embrace uncertainty and to reckon with it becomes more urgent.

Fernando reminds us of our own forgetfulness and the unreliability of our testimony about ourselves and our communities. For those of us wrestling with the post-truth world, Fernando’s essay is both a palliative and, potentially, charts a way out of no-alternative thinking.

Contact details:


Bloor, D. 2007. Epistemic grace: Antirelativism as theology in disguise. Common knowledge 13: 250-280.

Clark, A. and D. Chalmers. 1998. The extended mind. Analysis 58: 7–19.

Fuller, S. 2018. Post-Truth: Knowledge as a Power Game. Anthem Press.

Latour, B. 2004. Why Has Critique Run out of Steam?  From Matters of Fact to Matters of Concern Critical Inquiry 2004 30(2).

Nietzsche, F. 1924. The Joyful Wisdom (trans. T. Common) New York: The MacMillan Company. Accessed 10 June 2018.

Stengers, I. 2012. “Cosmopolitics: Learning to Think with Sciences, Peoples and Natures.” Public lecture. Situating Science Knowledge Cluster. St. Marys, Halifax, Canada, 5 March 2012. Accessed 10 June 2018.

Stengers, I. 2015. In Catastrophic Times: Resisting the coming Barbarism. Open Humanities Press/Meson Press.

Stiegler, B. 2011. Technics and Time, 3: Cinematic Time and the Question of Malaise (trans. R. Beardsworth and G. Collins). Stanford: Stanford University Press.

Stiegler, B. 2013. For a New Critique of Political Economy (trans. D. Ross). Cambridge: Polity.

Author Information: Rik Peels, Vrije Universiteit Amsterdam,

Peels, Rik. “Exploring the Boundaries of Ignorance: Its Nature and Accidental Features.” Social Epistemology Review and Reply Collective 8, no. 1 (2019): 10-18.

The pdf of the article gives specific page references. Shortlink:

From the Metropolitan United Church in downtown Toronto.
Image by Loozrboy via Flickr / Creative Commons


This article responds to El Kassar, Nadja (2018). “What Ignorance Really Is: Examining the Foundations of Epistemology of Ignorance.” Social Epistemology. DOI: 10.1080/02691728.2018.1518498.

As does Bondy, Patrick. “Knowledge and Ignorance, Theoretical and Practical.” Social Epistemology Review and Reply Collective 7, no. 12 (2018): 9-14.

Nadja El Kassar is right that different fields in philosophy use rather different conceptions of ignorance. I also agree with her that there seem to be three major conceptions of ignorance: (i) ignorance as propositional ignorance, which she calls the ‘propositional conception of ignorance’, (ii) ignorance as actively upheld false outlooks, which she names the ‘agential conception of ignorance’, and (iii) ignorance as an epistemic practice, which she dubs the ‘structural conception of ignorance’.

It is remarkable that nobody else has addressed the question before of how these three conceptions relate to each other. I consider it a great virtue of her lucid essay that she not only considers this question in detail, but also provides an account that is meant to do justice to all these different conceptions of ignorance. Let us call her account the El Kassar Synthesis. It reads as follows:

Ignorance is a disposition of an epistemic agent that manifests itself in her beliefs – either she has no belief about p or a false belief – and her epistemic attitudes (doxastic attitudes, epistemic virtues, epistemic vices).[1]

My reply to her insightful paper is structured as follows. First, I argue that her synthesis needs revision on various important points (§2). After that, I show that, despite her ambition to capture the main varieties of ignorance in her account, there are important kinds of ignorance that the El Kassar Synthesis leaves out (§4).

I then consider the agential and structural conceptions of ignorance and suggest that we should distinguish between the nature of ignorance and its accidental features. I also argue that these two other conceptions of ignorance are best understood as accounts of important accidental features of ignorance (§5). I sketch and reply to four objections that one might level against my account of the nature and accidental features of ignorance (§6).

I conclude that ignorance should be understood as the absence of propositional knowledge or the absence of true belief, the absence of objectual knowledge, or the absence of procedural knowledge. I also conclude that epistemic vices, hermeneutical frameworks, intentional avoidance of evidence, and other important phenomena that the agential and structural conceptions of ignorance draw our attention to, are best understood as important accidental features of ignorance, not as properties that are essential to ignorance.


Before I explore the tenability of the El Kassar Synthesis in more detail, I would like to make a few preliminary points about it that call for some fine-tuning on her part. Remember that on the El Kassar Synthesis, ignorance should be understood as follows:

El Kassar Synthesis version 1: Ignorance is a disposition of an epistemic agent that manifests itself in her beliefs – either she has no belief about p or a false belief – and her epistemic attitudes (doxastic attitudes, epistemic virtues, epistemic vices).[2]

It seems to me that this synthesis needs revision on at least three points.

First, a false belief is an epistemic attitude and even a doxastic attitude. Moreover, if – as is widely thought among philosophers – there are exactly three doxastic attitudes, namely belief, disbelief, and suspension of judgment, then any case of ignorance that manifests itself in a doxastic attitude is one in which one lacks a belief about p or one has a false belief about p.

After all, if one holds a false belief and that is manifest in one’s doxastic attitude, it is because one holds a false belief (that is the manifestation). If one holds no belief and that is manifest in one’s doxastic attitudes, it is because one suspends judgment (that is the manifestation). Of course, it is also possible that one is deeply ignorant (e.g, one cannot even consider the proposition), but then it is simply not even manifest in one’s doxastic attitudes.

The reference to doxastic attitudes in the second conjunct is, therefore, redundant. The revised El Kassar Synthesis reads as follows:

El Kassar Synthesis version 2: Ignorance is a disposition of an epistemic agent that manifests itself in her beliefs – either she has no belief about p or a false belief – and her epistemic attitudes (epistemic virtues, epistemic vices).

What is left in the second conjunct after the first revision is epistemic virtues and vices. There is a problem with this, though. Ignorance need not be manifested in any epistemic virtues or vices. True, it happens often enough. But it is not necessary; it does not belong to the essence of being ignorant.

If one is ignorant of the fact that Antarctica is the greatest desert on earth (which is actually a fact), then that may simply be a fairly cognitively isolated, single fact of which one is ignorant. Nothing follows about such substantial cognitive phenomena as intellectual virtues and vices (which are, after all, dispositions) like open-mindedness or dogmatism. A version that takes this point into account reads as follows:

El Kassar Synthesis version 3: Ignorance is a disposition of an epistemic agent that manifests itself in her beliefs: either she has no belief about p or a false belief.

A third and final worry I would like to raise here is that on the El Kassar Synthesis, ignorance is a disposition of an epistemic agent that manifests itself in her beliefs—and, as we saw, on versions 1 and 2, in her intellectual character traits (epistemic virtues, epistemic vices). I find this worrisome, because it is widely accepted that virtues and vices are dispositions themselves, and many philosophers have argued this also holds for beliefs.[3]

If so, on the El Kassar Synthesis, ignorance is a disposition that manifests itself in a number of dispositions (beliefs, lack of beliefs, virtues, vices). What sort of thing is ignorance if it is a disposition to manifest certain dispositions? It seems if one is disposed to manifest certain dispositions, one simply has those dispositions and will, therefore, manifest them in the relevant circumstances.

Moreover, virtue or the manifestation of virtue does not seem to be an instance or exemplification of ignorance; at most, this seems to be the case for vices. Open-mindedness, thoroughness, and intellectual perseverance are clearly not manifestations of ignorance.[4] If anything, they are the opposite: manifestations of knowledge, insight, and understanding. An account that takes these points also into account would therefore look as follows:

El Kassar Synthesis version 4: Ignorance is an epistemic agent’s having no belief or a false belief about p.

It seems to me that version 4 is significantly more plausible than version 1. I realize, though, that it is also a significant revision of the original El Kassar Synthesis. My criticisms in what follows will, therefore, also be directed against version 1 of El Kassar’s synthesis.

Propositional, Objectual, and Procedural Ignorance

On the first conception of ignorance that El Kassar explores, the propositional one, ignorance is ignorance of the truth of a proposition. On the Standard View of ignorance, defended by Pierre Le Morvan and others,[5] ignorance is lack of propositional knowledge, whereas on the New View, championed by me and others,[6] ignorance is lack of true belief.

I would like to add that it may more suitable to call these ‘conceptions of propositional ignorance’ rather than ‘positional conceptions of ignorance’. After all, they are explicitly concerned with and limit themselves to situations in which one is ignorant of the truth of one or more propositions; they do not say that all ignorance is ignorance of a proposition.

More importantly, though, we should note that ever since Bertrand Russell, it has been quite common in epistemology to distinguish not only propositional knowledge (or knowledge-that), but also knowledge by acquaintance or objectual knowledge (knowledge-of) and procedural or technical knowledge (knowledge-how).[7]

Examples of knowledge by acquaintance are my knowledge of my fiancée’s lovely personality, my knowledge of the taste of the Scotch whisky Talisker Storm, my knowledge of Southern France, and my knowledge of the smell of fresh raspberries. Examples of technical or procedural knowledge are my knowledge of how to navigate through Amsterdam by bike, my knowledge of how to catch a North Sea cod, my knowledge of how to get the attention of a group of 150 students (the latter, incidentally, suggests that know-how comes in degrees…).

Since ignorance is often taken to be lack of knowledge, it is only natural to consider whether there can also be objectual and technical ignorance. Nikolaj Nottelmann, in a recent piece, has convincingly argued that there are such varieties of ignorance.[8]

The rub is that the El Kassar Synthesis, on all of its four versions, does not capture these two other varieties of ignorance. If one is ignorant of how to ride a bike, it is not so much that one lacks beliefs about p or that one has false beliefs about p (even if it is clear exactly which proposition p is). Also, not knowing how to ride a bike does not seem to come with certain intellectual virtues or vices.

The same is true for objectual ignorance: if I am not familiar with the smell of fresh raspberries, that does not imply any false beliefs or absence of beliefs, nor does it come with intellectual virtues or vices. Objectual and procedural ignorance seem to be sui generis kinds of ignorance.

The following definition does capture these three varieties of ignorance—one that, for obvious reasons, I will call the ‘threefold synthesis’:

Threefold Synthesis: Ignorance is an epistemic agent’s lack of propositional knowledge or lack of true belief, lack of objectual knowledge, or lack of procedural knowledge.[9]

Of course, each of the four versions of the El Kassar Synthesis could be revised so as to accommodate this. As we shall see below, though, we have good reason to formulate the Threefold Synthesis independently from the El Kassar Synthesis.

The Agential and Structural Conceptions of Ignorance

According to El Kassar, there is a second conception of ignorance, not captured in the conception of propositional ignorance but captured in the conception of agential ignorance, namely ignorance as an actively upheld false outlook. This conception has, understandably, been particularly influential in the epistemology of race. Charles Mills, whose contributions to this field have been seminal, defines such ignorance as the absence of beliefs, false belief, or a set of false beliefs, brought about by various factors, such as people’s whiteness in the case of white people, that leads to a variety of behavior, such as avoiding evidence.[10] El Kassar suggests that José Medina, who has also contributed much to this field, defends a conception along these lines as well.[11]

The way Charles Mills phrases things suggests a natural interpretation of such ignorance, though. It is this: ignorance is the lack of belief, false beliefs, or various false beliefs (all captured by the conception of propositional ignorance), brought about or caused by a variety of factors. What these factors are will differ from case to case: people’s whiteness, people’s social power and status, people’s being Western, people’s being male, and people’s being heterosexual.

But this means that the agential conception is not a conception of the nature of ignorance. It grants the nature of ignorance as conceived of by the conception of propositional ignorance spelled out above and then, for obvious reasons, goes on to focus on those cases in which such ignorance has particular causes, namely the kinds of factors I just mentioned.[12]

Remarkably, much of what El Kassar herself says supports this interpretation. For example, she says: “Medina picks out a kind of ignorance, active ignorance, that is fed by epistemic vices – in particular, arrogance, laziness and closed-mindedness.” (p. 3; italics are mine) This seems entirely right to me: the epistemology of race focuses on ignorance with specific, contingent features that are crucially relevant for the debate in that field: (i) it is actively upheld, (ii) it is often, but not always, disbelieving ignorance, (iii) it is fed by epistemic vices, etc.

This is of course all perfectly compatible with the Standard or New Views on Ignorance. Most people’s ignorance of the fact that Antarctica is the largest desert on earth is a clear case of ignorance, but one that is not at all relevant to the epistemology of race.

Unsurprisingly then, even though it clearly is a case of ignorance, it does not meet any of the other, contingent criteria that are so pivotal in critical race theory: (i) it is not actively upheld, (ii) it is deep ignorance rather than disbelieving ignorance (most people have never considered this statement about Antarctica), (iii) it is normally not in any way fed by epistemic vices, such as closed-mindedness, laziness, intellectual arrogance, or dogmatism.

That this is a more plausible way of understanding the nature of ignorance and its accidental features can be seen by considering what is widely regarded as the opposite of ignorance: knowledge. According to most philosophers, to know a particular proposition p is to believe a true proposition p on the basis of some kind of justification in a non-lucky (in some sense of the word) way. That is what it is to know something, that is the nature of knowledge.

But in various cases, knowledge can have all sorts of accidental properties: it can be sought and found or one can stumble upon it, it may be the result of the exercise of intellectual virtue or it may be pretty much automatic (such as in the case of my knowledge that I exist), it may be morally good to know that thing or it may be morally bad (as in the case of a privacy violation), it may be based primarily on the exercise of one’s own cognitive capacities or primarily on those of other people (in some cases of testimony), and so on. If this is the case, then it is only natural to think that the same applies to the opposite of knowledge, namely ignorance, and that we should, therefore, clearly distinguish between its nature and its accidental (sometimes crucially important) features:

The nature of ignorance

Ignorance is the lack of propositional knowledge / the lack of true belief, or the lack of objectual knowledge, or the lack of procedural knowledge.[13]

Accidental, context-dependent features of ignorance

Willful or unintentional;

Individual or collective;

Small-scale (individual propositions) or large-scale (whole themes, topics, areas of life);

Brought about by external factors, such as the government, institutions, or socially accepted frameworks, or internal factors, such as one’s own intellectual vices, background assumptions, or hermeneutic paradigms;

And so on.

According to El Kassar, an advantage of her position is that it tells us how one is ignorant (p. 7). However, an account of, say, knowledge, also need not tell us how a particular person in specific circumstances knows something.[14] Perceptual knowledge is crucially important in our lives, and so is knowledge based on memory, moral knowledge (if there is such a thing), and so on.

It is surely no defect in all the many accounts of knowledge, such as externalism, internalism, reliabilism, internalist externalism, proper functionalism, deontologism, or even knowledge-first epistemology, that they do not tell us how a particular person in specific circumstances knows something. They were never meant to do that.

Clearly, mutatis mutandis, the same point applies to the structural conception of ignorance that plays an important role in agnotology. Agnotology is the field that studies how various institutional structures and mechanisms can intentionally keep people ignorant or make them ignorant or create different kinds of doubt. The ignorance about the effects of smoking brought about and intentionally maintained by the tobacco industry is a well-known example.

Again, the natural interpretation is to say that people are ignorant because they lack propositional knowledge or true belief, they lack objectual knowledge, or they lack procedural knowledge. And they do so because – and this is what agnotology focuses on – it is intentionally brought about or maintained by various institutions, agencies, governments, mechanisms, and so on. Understandably, the field is more interested in studying those accidental features of ignorance than in studying its nature.

Objections and Replies

Before we draw a conclusion, let us consider El Kassar’s objections to a position along the lines I have suggested.[15] First, she suggests that we lose a lot if we reject the agential and structural conceptions of ignorance. We lose such things as: ignorance as a bad practice, the role of epistemic agency, the fact that much ignorance is strategic, and so on. I reply that, fortunately, we do not: those are highly important, but contingent features of ignorance: some cases of ignorance have them, others do not. This leaves plenty of room to study such contingent features of ignorance in critical race theory and agnotology.[16]

Second, she suggests that this account would exclude highly important kinds of ignorance, such as ignorance deliberately constructed by companies. I reply that it does not: it just says that its being deliberately constructed by, say, pharmaceutical companies, is an accidental or contingent feature and that it is not part of the nature of ignorance.

Third, Roget’s Thesaurus, for example, lists knowledge as only one of the antonyms of ignorance. Other options are cognizance, understanding, competence, cultivation, education, experience, intelligence, literacy, talent, and wisdom. I reply that we can make sense of this on my alternative, threefold synthesis: competence, cultivation, education, intelligence, and so on, all come with knowledge and true belief and remove certain kinds of ignorance. Thus, it makes perfect sense that these are mentioned as antonyms of ignorance.

Finally, one may wonder whether my alternative conception enables us to distinguish between Hannah and Kate, as described by El Kassar. Hannah is deeply and willingly ignorant about the high emissions of both carbon and sulfur dioxides of cruise ships (I recently found out that a single cruise trip has roughly the same amount of emission as seven million cars in an average year combined). Kate is much more open-minded, but has simply never considered the issue in any detail.

She is in a state of suspending ignorance regarding the emission of cruise ships. I reply that they are both ignorant, at least propositionally ignorant, but that their ignorance has different, contingent features: Hannah’s ignorance is deep ignorance, Kate’s ignorance is suspending ignorance, Hannah’s ignorance is willing or intentional, Kate’s ignorance is not. These are among the contingent features of ignorance; both are ignorant and, therefore, meet the criteria that I laid out for the nature of ignorance.

The Nature and Accidental Features of Ignorance

I conclude that ignorance is the lack of propositional knowledge or true belief, the lack of objectual knowledge, or the lack of procedural knowledge. That is the nature of ignorance: each case meets this threefold disjunctive criterion. I also conclude that ignorance has a wide variety of accidental or contingent features. Various fields have drawn attention to these accidental or contingent features because they matter crucially in certain debates in those fields. It is not surprising then that the focus in mainstream epistemology is on the nature of ignorance, whereas the focus in agnotology, epistemology of race, feminist epistemology, and various other debates is on those context-dependent features of ignorance.

This is not at all to say that the nature of ignorance is more important than its accidental features. Contingent, context-dependent features of something may be significantly more important. For example, it may well be the case that we have the parents that we have essentially; that we would be someone else if we had different biological parents. If so, that is part of our nature or essence.

And yet, certain contingent and accidental features may matter more to us, such as whether or not our partner loves us. Let us not confuse the nature of something with the accidental features of it that we value or disvalue. If we get this distinction straight, there is no principled reason not to accept the threefold synthesis that I have suggested in this paper as a plausible alternative to El Kassar’s synthesis.[17]

Contact details:


Driver, Julia. (1989). “The Virtues of Ignorance,” The Journal of Philosophy 86.7, 373-384.

El Kassar, Nadja. (2018). “What Ignorance Really Is: Examining the Foundations of Epistemology of Ignorance”, Social Epistemology, DOI: 10.1080/02691728.2018.1518498.

Le Morvan, Pierre. (2011). “On Ignorance: A Reply to Peels”, Philosophia 39.2, 335-344.

Medina, José. (2013). The Epistemology of Resistance (Oxford: Oxford University Press).

Mills, Charles. (2015). “Global White Ignorance”, in M. Gross and L. McGoey (eds.), Routledge International Handbook of Ignorance Studies (London: Routledge), 217-227.

Nottelmann, Nikolaj. (2015). “Ignorance”, in Robert Audi (ed.), Cambridge Dictionary of Philosophy, 3rd ed. (Cambridge: Cambridge University Press).

Peels, Rik. (2010). “What Is Ignorance?”, Philosophia 38, 57-67.

Peels, Rik. (2014). “What Kind of Ignorance Excuses? Two Neglected Issues”, The Philosophical Quarterly 64 (256), 478–496.

Peels, Rik, ed. 2017. Perspectives on Ignorance from Moral and Social Philosophy (New York: Routledge).

Peels, Rik. (2019). “Asserting Ignorance”, in Sanford C. Goldberg (ed.), Oxford Handbook of Assertion (Oxford: Oxford University Press), forthcoming.

Peels, Rik, and Martijn Blaauw, eds. (2016). The Epistemic Dimensions of Ignorance (Cambridge: Cambridge University Press).

Russell, Bertrand. (1980). The Problems of Philosophy (Oxford: Oxford University Press).

Schwitzgebel, Eric. (2002). “A Phenomenal, Dispositional Account of Belief”, Noûs 36.2, 249-275.

[1] El Kassar 2018, 7.

[2] El Kassar 2018, 7.

[3] E.g. Schwitzgebel 2002.

[4] Julia driver (1989) has argued that certain moral virtues, such as modesty, imply some kind of ignorance. However, moral virtues are different from epistemic virtues and the suggestion that something implies ignorance is different from the idea that something manifests ignorance.

[5] See Le Morvan 2011. See also various essays in Peels and Blaauw 2016; Peels 2017.

[6] See Peels 2010; 2014; 2019. See also various essays in Peels and Blaauw 2016; Peels 2017.

[7] See Russell 1980, 3.

[8] See Nottelmann 2015.

[9] If the Standard View on Ignorance is correct, then one could simply replace this with: Ignorance is a disposition of an epistemic agent that manifests itself in lack of (propositional, objectual, or procedural) knowledge.

[10] See Mills 2015, 217.

[11] See Medina 2013.

[12] El Kassar in her paper mentions Anne Meylan’s suggestion on this point. Anne Meylan has suggested – and confirmed to me in personal correspondence – that we ought to distinguish between the state of being ignorant (which is nicely captured by the Standard View or the New View) and the action or failure to act that induced that state of ignorance (that the agential and structural conceptions of ignorance refer to), such as absence of inquiry or a sloppy way of dealing with evidence. I fully agree with Anne Meylan’s distinction on this point and, as I argue in more detail below, taking this distinction into account can lead to a significantly improved account of ignorance.

[13] The disjunction is meant to be inclusive.

[15] See pp. 4-5 of her paper.

[16] As Anne Meylan has pointed out to me in correspondence, it is generally true that doxastic states are not as such morally bad; whether or not they are depends on their contingent, extrinsic features.

[17] For their helpful comments on earlier versions of this paper, I would like to thank Thirza Lagewaard, Anne Meylan, and Nadja El Kassar.

Author Information: Patrick Bondy, Wichita State University,

Bondy, Patrick. “Knowledge and Ignorance, Theoretical and Practical.” Social Epistemology Review and Reply Collective 7, no. 12 (2018): 9-14.

The pdf of the article gives specific page references. Shortlink:

Image by The Naked Ape via Flickr / Creative Commons


In “What Ignorance Really Is: Examining the Foundations of Epistemology of Ignorance,” Nadja El Kassar brings disparate conceptions of ignorance from recent epistemology into contact with each other, and she proposes an integrated conception of ignorance which aims to capture the important aspects of each of these conceptions. This paper is both useful and stimulating for anyone interested in the subjects of knowledge and ignorance, especially those who might be ignorant of work on ignorance conducted in other branches of epistemology.

El Kassar’s View of Ignorance

El Kassar identifies three broad approaches to ignorance in the epistemology literature which lead up to her proposed integrated conception:

(1) Propositional conception of ignorance

This is the standard approach in epistemology. On this approach, ignorance consists of a subject’s lacking either knowledge of or belief in a true proposition.

(2) Agential conception of ignorance

Agential ignorance goes beyond mere propositional ignorance, in “explicitly includ[ing] the epistemic agent as contributing to and maintaining ignorance” (p.3). Epistemic vices such as arrogance, laziness, and closed-mindedness contribute to this sort of ignorance. On this approach, the particular way in which ignorance is brought about or maintained is viewed as partly constitutive of the ignorance itself.

(3) Structural conception of ignorance

Like the agential conception, this conception of ignorance views the causes of ignorance as partly constitutive of ignorance. Unlike the agential conception, however, the structural conception takes into account belief-forming practices and social structures that go beyond the individual cognizer.

(4) Integrated conception of ignorance

El Kassar argues that each of these other conceptions of ignorance gets at something important, and that they are not reducible to each other. So she proposes her integrated conception, which aims to bring the key features of these approaches together: “Ignorance is a disposition of an epistemic agent that manifests itself in her beliefs – either she has no belief about p or a false belief – and her epistemic attitudes (doxastic attitudes, epistemic virtues, epistemic vices)” (p.7).

In the remainder of this commentary, I will do three things. First, I will briefly argue in defense of the Standard View, on the ground that we can say everything we want to say about ignorance, taking the propositional conception of ignorance as fundamental. Second, I will suggest that proponents of the Standard View of ignorance do not need to choose between viewing ignorance as a lack of knowledge and ignorance as lack of true belief. Just as there are strong and weak senses of “knowledge,” there can be corresponding weak and strong senses of “ignorance.”

Third, I will propose that we should recognize another kind of ignorance, which we might call practical ignorance, which consists of not knowing how to do things. There is a clear way in which practical ignorance is distinct from propositional ignorance, given that knowledge-how and knowledge-that appear to be different kinds of knowledge that are irreducible to each other. But there is also a sense in which practical ignorance can be partly constitutive of propositional ignorance, which is similar to how El Kassar sees agential ignorance as partly constitutive of ignorance in general. Indeed, I will suggest, El Kassar’s integrated view of ignorance might easily be extended to cover practical ignorance as well.

Propositional Ignorance as Fundamental

I want to defend the view that propositional ignorance is the most fundamental kind of ignorance. Viewing ignorance this way is intuitively plausible, and it allows us to say everything we need to say about ignorance.

The claim that propositional ignorance is most fundamental is ambiguous. On the one hand, it might mean that agential and structural ignorance are entirely reducible to it, in the sense that the crucial aspects of agential and structural ignorance as described above, such as the cognitive dispositions of individual subject or the knowledge-producing institutions extant in a society, are themselves all forms of propositional ignorance or that they derive from propositional ignorance.

El Kassar notes that that kind of reductivism is implausible, and it is not the view I mean to defend here. Instead, I mean to defend the proposal that “The propositional conception is most fundamental because the second and the third conceptions are not really conceptions of ignorance but rather accounts of different causes of ignorance” (p. 4).

On this view, the only condition that constitutes ignorance is lack of knowledge or true belief, and so all ignorance is propositional ignorance. But propositional ignorance might be brought about in various ways, and it is useful to distinguish the various ways in which it can be brought about or sustained, especially when some of those ways make a person’s or a group’s ignorance particularly dangerous or resilient.

This approach does not aim to denigrate the projects pursued by proponents of agential and structural conceptions of ignorance. It does not even aim to prevent us from talking about different kinds of ignorance as differentiated by their agential or structural causes.

Just as we can categorize propositional knowledge into different kinds based on the subject matter of what is known and the methods by which knowledge in different areas is acquired, all the while acknowledging that these are still all kinds of propositional knowledge, so too we can distinguish kinds of propositional ignorance based on the subject matter and the ways in which ignorance is caused or maintained, while still recognizing these as kinds of propositional ignorance.

El Kassar objects (p. 4) that this proposal misunderstands the agential and structural conceptions of ignorance, for they aim to broaden our view of ignorance, to incorporate more than just propositional ignorance. They view certain kinds of agential or structural causes of ignorance as part of what constitutes ignorance itself. Propositional conceptions of ignorance cannot capture these aspects of ignorance; these aspects of ignorance are not propositional in nature, after all.

But it seems that propositionalists can make two replies here. First, if virtue epistemologists such as Greco (2009) are right, then knowledge itself depends on subjects possessing and exercising certain cognitive abilities. In that case, there are agential aspects to propositional knowledge—and in some cases, to propositional ignorance. So some aspects of agential ignorance can be built into propositional ignorance.

And second, it’s not clear that we need to broaden the conception of ignorance to include things beyond propositional ignorance. Granting that there are aspects of agential and structural conceptions of ignorance that are left out of the account of what ignorance is when we take propositional ignorance as fundamental, it does not follow that we cannot take those aspects of agential and structural ignorance into account at all.

Some kinds of causes of ignorance are worth dwelling on in our theories of knowledge and ignorance. We just don’t need to think of the causes of ignorance as themselves forms of ignorance, or as part of what constitutes ignorance.

So it seems to me that we can still say everything we want to say about what are here called propositional, agential, and structural ignorance, even if we only ultimately count propositional ignorance as ignorance proper, and we count the features of agential and structural ignorance as important causes of ignorance proper but not themselves constitutive of ignorance.

Propositional Ignorance: Lack of Knowledge or True Belief?

El Kassar notes that if we take the propositional conception as fundamental, then we will need to decide whether to take ignorance to consist of a lack of true belief or a lack of knowledge. But perhaps we can have it both ways. As Goldman and Olsson (2010) note, ordinarily, from the fact that S lacks knowledge that p, one may infer that S is ignorant of p. Knowledge and ignorance appear to exhaust the logical space, for a given subject S and true proposition p.

Furthermore, in ordinary English there are strong and weak senses of “knowledge,” with the weak sense meaning simply true belief, and the strong sense meaning Gettier-proof justified true belief. In the weak sense of “knowledge,” ignorance is a lack of knowledge and a lack of true belief, because knowledge and true belief are one and the same, on this conception of knowledge.

In the strong sense of knowledge, on the other hand, a lack of knowledge results from lacking true belief, or from lacking justification, or from being Gettiered. But, Goldman and Olsson argue, lacking justification or being Gettiered do not make a person ignorant of whether p is true. As long as p is true and S believes p, it is incorrect to say that S is ignorant of p.

So Goldman and Olsson plump for the view of ignorance as lack of true belief. But another option is to take their initial point about ignorance as a lack of knowledge at face value. Given that ignorance is a lack of knowledge, and given that there are strong and weak senses of “knowledge,” one would expect that there also are strong and weak senses of “ignorance.” A lack of knowledge in the weak sense would be ignorance in the strong sense, and a lack of knowledge in the strong sense would be ignorance in the weak sense. Because knowledge in the strong sense consists of more than knowledge in the weak sense, a lack of knowledge in the strong sense takes less than does a lack of knowledge in the weak sense.

Practical Ignorance

The proposal here is that ignorance at bottom consists of a lack of knowledge. So far, in line with the Standard View, we have only been considering propositional knowledge: ignorance consists of the existence of a true proposition p, and S’s lacking knowledge that p.

But on the assumption that knowledge-how is not reducible to knowledge-that, it seems useful to have a conception of ignorance which will apply to the lack of knowledge-how.[1] For example, it seems natural enough to say that I am ignorant of how to kick a field goal, or how to speak Mandarin, or how to build a sturdy chair. And if knowledge-how is not just a species of knowledge-that, then my ignorance of these things consists of more than a simple lack of true beliefs about how these things are done: they consist at least in part of my lacking the ability to do them. We can call this kind of ignorance practical ignorance.

Importantly, practical ignorance is not reducible to the agential kind of ignorance discussed above. Although the agential conception takes cognitive abilities and dispositions to be partly constitutive of ignorance, practical ignorance would be much broader, encompassing practical inabilities as well as cognitive inabilities. Further, the agential conception of ignorance draws our attention to ignorance that can sometimes be actively maintained by very sophisticated intellectual abilities, in which case such ignorance does not manifest practical ignorance.

For example, one might have the ability to reinterpret data to support a preferred outlook. That is not a truth-conducive ability, but it is an ability to form desired beliefs, and it is an ability at which people can become quite proficient. In cases where a subject exercises such an ability, she might successfully maintain a distorted or mistaken outlook because of the exercise of practical abilities, not because of practical ignorance.

Like propositional ignorance, practical ignorance can be partly caused or sustained by agential and structural features of a person or a society. For example, practical ignorance can be actively maintained by an individual’s interference in her own development, or by other people’s interference in her development. Social structures geared toward the oppression of segments of the population, or which simply encourage members of certain social groups to participate in some activities and not to participate in others, can also contribute to sustaining people’s practical inabilities.

And, like agential ignorance, practical ignorance can be responsible for maintaining propositional ignorance in individuals or in groups, about individual propositions or about whole domains of knowledge.

For example, the inability to speak local languages can keep victims of human trafficking from gaining knowledge of the kinds of resources that might be available to them. The inability to perform relatively simple arithmetical calculations can prevent an individual from knowing whether she is receiving the correct amount of change in a transaction. The inability to conceptualize certain kinds of behaviour as abusive can sustain a lack of understanding of one’s situation.[2] And so on.

So although practical and propositional ignorance are different kinds of ignorance, on the assumption that know-how and knowledge-that are irreducible to each other, they appear to be susceptible to being intertwined in these ways.

The nature of practical ignorance and its relation to propositional ignorance bears further investigation. One potential feature of El Kassar’s integrated conception of ignorance is that, although it has a doxastic component built in, and so it does not account for practical ignorance as I am conceiving of it, it might be straightforwardly extended to cover practical ignorance as well.

For example, theoretical and practical ignorance might be defined and brought together as follows:

Theoretical ignorance: this would remain as El Kassar formulates her integrated conception of ignorance, as “a disposition of an epistemic agent that manifests itself in her beliefs – either she has no belief about p or a false belief – and her epistemic attitudes (doxastic attitudes, epistemic virtues, epistemic vices)” (p.7).

Practical ignorance: a disposition of an agent that manifests itself in her actions – where S fails to φ, or S does not φ well or properly – and her practical attitudes (ethical and pragmatic attitudes, ethical or practical virtues and vices).

Ignorance in general: combines theoretical and practical ignorance. Ignorance in general would then be: a disposition of an agent that manifests itself in an agent’s beliefs or actions – whereby she fails to succeed in achieving the characteristic goal of the activity in question (believing truly, knowing, or successfully carrying out some practical action) – and in her epistemic and practical attitudes (doxastic attitudes, ethical attitudes, epistemic and practical virtues and vices).

Of course, this is only a suggestion about how practical ignorance could be conceptualized. I have argued in defense of the Standard View of (theoretical) ignorance, so this sort of unified integrated conception is not available to me. Nor do I mean to suggest that El Kassar is committed to developing her view of ignorance in this direction.

Still, given a commitment to El Kassar’s integrated view of ignorance, and given that we should also want to give an account of practical ignorance, this seems like a plausible way to deliver a unified treatment of ignorance.

Contact details:


El Kassar, Nadja (2018). “What Ignorance Really Is: Examining the Foundations of Epistemology of Ignorance.” Social Epistemology. DOI: 10.1080/02691728.2018.1518498.

Goldman, Alvin and Olsson, Erik (2009). “Reliabilism and the Value of Knowledge.” In: A. Haddock, A. Millar, and D. Pritchard, eds., Epistemic Value. Oxford: Oxford University Press, 19-41.

Greco, John (2009). “Knowledge and Success from Ability.” Philosophical Studies 142 (1): 17-26.

Fricker, Miranda (2007). Epistemic Injustice: Power and the Ethics of Knowing. Oxford: Oxford University Press.

Peels, Rik (2010). “What Is Ignorance?” Philosophia 38: 57–67.

[1] Peels (2010) briefly considers the possibility of practical ignorance, only to set it aside and focus on propositional ignorance.

[2] I have in mind here Fricker’s (2007) treatment of hermeneutical injustice.

Author Information: Luca Tateo, Aalborg University & Federal University of Bahia,

Tateo, Luca. “Ethics, Cogenetic Logic, and the Foundation of Meaning.” Social Epistemology Review and Reply Collective 7, no. 12 (2018): 1-8.

The pdf of the article gives specific page references. Shortlink:

Mural entitled “Paseo de Humanidad” on the Mexican side of the US border wall in the city of Heroica Nogales, in Sonora. Art by Alberto Morackis, Alfred Quiróz and Guadalupe Serrano.
Image by Jonathan McIntosh, via Flickr / Creative Commons


This essay is in reply to: Miika Vähämaa (2018) Challenges to Groups as Epistemic Communities: Liminality of Common Sense and Increasing Variability of Word Meanings, Social Epistemology, 32:3, 164-174, DOI: 10.1080/02691728.2018.1458352

In his interesting essay, Vähämaa (2018) discusses two issues that I find particularly relevant. The first one concerns the foundation of meaning in language, which in the era of connectivism (Siemens, 2005) and post-truth (Keyes, 2004) becomes problematic. The second issue is the appreciation of epistemic virtues in a collective context: how the group can enhance the epistemic skill of the individual?

I will try to explain why these problems are relevant and why it is worth developing Vähämaa’s (2018) reflection in the specific direction of group and person as complementary epistemic and ethic agents (Fricker, 2007). First, I will discuss the foundations of meaning in different theories of language. Then, I will discuss the problems related to the stability and liminality of meaning in the society of “popularity”. Finally I will propose the idea that the range of contemporary epistemic virtues should be integrated by an ethical grounding of meaning and a co-genetic foundation of meaning.

The Foundation of Meaning in Language

The theories about the origins of human language can be grouped in four main categories, based on the elements characterizing the ontogenesis and glottogenesis.

Sociogenesis Hypothesis (SH): it is the idea that language is a conventional product, that historically originates from coordinated social activities and it is ontogenetically internalized through individual participation to social interactions. The characteristic authors in SH are Wundt, Wittgenstein and Vygotsky (2012).

Praxogenesis Hypothesis (PH): it is the idea that language historically originates from praxis and coordinated actions. Ontogenetically, the language emerges from senso-motory coordination (e.g. gaze coordination). It is for instance the position of Mead, the idea of linguistic primes in Smedslund (Vähämaa, 2018) and the language as action theory of Austin (1975).

Phylogenesis Hypothesis (PhH): it is the idea that humans have been provided by evolution with an innate “language device”, emerging from the evolutionary preference for forming social groups of hunters and collective long-duration spring care (Bouchard, 2013). Ontogenetically, language predisposition is wired in the brain and develops in the maturation in social groups. This position is represented by evolutionary psychology and by innatism such as Chomsky’s linguistics.

Structure Hypothesis (StH): it is the idea that human language is a more or less logic system, in which the elements are determined by reciprocal systemic relationships, partly conventional and partly ontic (Thao, 2012). This hypothesis is not really concerned with ontogenesis, rather with formal features of symbolic systems of distinctions. It is for instance the classical idea of Saussure and of the structuralists like Derrida.

According to Vähämaa (2018), every theory of meaning has to deal today with the problem of a terrific change in the way common sense knowledge is produced, circulated and modified in collective activities. Meaning needs some stability in order to be of collective utility. Moreover, meaning needs some validation to become stable.

The PhH solves this problem with a simple idea: if humans have survived and evolved, their evolutionary strategy about meaning is successful. In a natural “hostile” environment, our ancestors must have find the way to communicate in such a way that a danger would be understood in the same way by all the group members and under different conditions, including when the danger is not actually present, like in bonfire tales or myths.

The PhH becomes problematic when we consider the post-truth era. What would be the evolutionary advantage to deconstruct the environmental foundations of meaning, even in a virtual environment? For instance, what would be the evolutionary advantage of the common sense belief that global warming is not a reality, considered that this false belief could bring mankind to the extinction?

StH leads to the view of meaning as a configuration of formal conditions. Thus, stability is guaranteed by structural relations of the linguistic system, rather than by the contribution of groups or individuals as epistemic agents. StH cannot account for the rapidity and liminality of meaning that Vähämaa (2018) attributes to common sense nowadays. SH and PH share the idea that meaning emerges from what people do together, and that stability is both the condition and the product of the fact that we establish contexts of meaningful actions, ways of doing things in a habitual way.

The problem is today the fact that our accelerated Western capitalistic societies have multiplied the ways of doing and the number of groups in society, decoupling the habitual from the common sense meaning. New habits, new words, personal actions and meanings are built, disseminated and destroyed in short time. So, if “Our lives, with regard to language and knowledge, are fundamentally bound to social groups” (Vähämaa, 2018, p. 169) what does it happen to language and to knowledge when social groups multiply, segregate and disappear in a short time?

From Common Sense to the Bubble

The grounding of meaning in the group as epistemic agent has received a serious stroke in the era of connectivism and post-truth. The idea of connectivism is that knowledge is distributed among the different agents of a collective network (Siemens, 2005). Knowledge does not reside into the “mind” or into a “memory”, but is rather produced in bits and pieces, that the epistemic agent is required to search, and to assemble through the contribution of the collective effort of the group’s members.

Thus, depending on the configuration of the network, different information will be connected, and different pictures of the world will emerge. The meaning of the words will be different if, for instance, the network of information is aggregated by different groups in combination with, for instance, specific algorithms. The configuration of groups, mediated by social media, as in the case of contemporary politics (Lewandowsky, Ecker & Cook, 2017), leads to the reproduction of “bubbles” of people that share the very same views, and are exposed to the very same opinions, selected by an algorithm that will show only the content compliant with their previous content preferences.

The result is that the group loses a great deal of its epistemic capability, which Vähämaa (2018) suggests as a foundation of meaning. The meaning of words that will be preferred in this kind of epistemic bubble is the result of two operations of selection that are based on popularity. First, the meaning will be aggregated by consensual agents, rather than dialectic ones. Meaning will always convergent rather than controversial.

Second, between alternative meanings, the most “popular” will be chosen, rather than the most reliable. The epistemic bubble of connectivism originates from a misunderstanding. The idea is that a collectivity has more epistemic force than the individual alone, to the extent that any belief is scrutinized democratically and that if every agent can contribute with its own bit, the knowledge will be more reliable, because it is the result of a constant and massive peer-review. Unfortunately, the events show us a different picture.

Post-truth is actually a massive action of epistemic injustice (Fricker, 2007), to the extent that the reliability of the other as epistemic agent is based on criteria of similarity, rather than on dialectic. One is reliable as long as it is located within my own bubble. Everything outside is “fake news”. The algorithmic selection of information contributes to reinforce the polarization. Thus, no hybridization becomes possible, the common sense (Vähämaa, 2018) is reduced to the common bubble. How can the epistemic community still be a source of meaning in the connectivist era?

Meaning and Common Sense

SH and PH about language point to a very important historical source: the philosopher Giambattista Vico (Danesi, 1993; Tateo, 2015). Vico can be considered the scholar of the common sense and the imagination (Tateo, 2015). Knowledge is built as product of human experience and crystallized into the language of a given civilization. Civilization is the set of interpretations and solutions that different groups have found to respond to the common existential events, such as birth, death, mating, natural phenomena, etc.

According to Vico, all the human beings share a fate of mortal existence and rely on each other to get along. This is the notion of common sense: the profound sense of humanity that we all share and that constitutes the ground for human ethical choices, wisdom and collective living. Humans rely on imagination, before reason, to project themselves into others and into the world, in order to understand them both. Imagination is the first step towards the understanding of the Otherness.

When humans loose contact with this sensus communis, the shared sense of humanity, and start building their meaning on egoism or on pure rationality, civilizations then slip into barbarism. Imagination gives thus access to the intersubjectivity, the capability of feeling the other, while common sense constitutes the wisdom of developing ethical beliefs that will not harm the other. Vico ideas are echoed and made present by the critical theory:

“We have no doubt (…) that freedom in society is inseparable from enlightenment thinking. We believe we have perceived with equal clarity, however, that the very concept of that thinking (…) already contains the germ of the regression which is taking place everywhere today. If enlightenment does not [engage in] reflection on this regressive moment, it seals its own fate (…) In the mysterious willingness of the technologically educated masses to fall under the spell of any despotism, in its self-destructive affinity to nationalist paranoia (…) the weakness of contemporary theoretical understanding is evident.” (Horkheimer & Adorno, 2002, xvi)

Common sense is the basis for the wisdom, that allows to question the foundational nature of the bubble. It is the basis to understand that every meaning is not only defined in a positive way, but is also defined by its complementary opposite (Tateo, 2016).

When one uses the semantic prime “we” (Vähämaa, 2018), one immediately produces a system of meaning that implies the existence of a “non-we”, one is producing otherness. In return, the meaning of “we” can only be clearly defined through the clarification of who is “non-we”. Meaning is always cogenetic (Tateo, 2015). Without the capability to understand that by saying “we” people construct a cogenetic complex of meaning, the group is reduced to a self confirming, self reinforcing collective, in which the sense of being a valid epistemic agent is actually faked, because it is nothing but an act of epistemic arrogance.

How we can solve the problem of the epistemic bubble and give to the relationship between group and person a real epistemic value? How we can overcome the dangerous overlapping between sense of being functional in the group and false beliefs based on popularity?

Complementarity Between Meaning and Sense

My idea is that we must look in that complex space between the “meaning”, understood as a collectively shared complex of socially constructed significations, and the “sense”, understood as the very personal elaboration of meaning which is based on the person’s uniqueness (Vygotsky, 2012; Wertsck, 2000). Meaning and sense feed into each other, like common sense and imagination. Imagination is the psychic function that enables the person to feel into the other, and thus to establish the ethical and affective ground for the common sense wisdom. It is the empathic movement on which Kant will later on look for a logic foundation.

“Act in such a way that you treat humanity, whether in your own person or in the person of any other, never merely as a means to an end, but always at the same time as an end.” (Kant 1993, p. 36. 4:429)

I would further claim that maybe they feed into each other: the logic foundation is made possible by the synthetic power of empathic imagination. Meaning and sense feed into each other. On the one hand, the collective is the origin of internalized psychic activities (SH), and thus the basis for the sense elaborated about one’s own unique life experience. On the other hand, the personal sense constitutes the basis for the externalization of the meaning into the arena of the collective activities, constantly innovating the meaning of the words.

So, personal sense can be a strong antidote to the prevailing force of the meaning produced for instance in the epistemic bubble. My sense of what is “ought”, “empathic”, “human” and “ethic”, in other words my wisdom, can help me to develop a critical stance towards meanings that are build in a self-feeding uncritical way.

Can the dialectic, complementary and cogenetic relationship between sense and meaning become the ground for a better epistemic performance, and for an appreciation of the liminal meaning produced in contemporary societies? In the last section, I will try to provide arguments in favor of this idea.

Ethical Grounding of Meaning

If connectivistic and post-truth societies produce meanings that are based on popularity check, rather than on epistemic appreciation, we risk to have a situation in which any belief is the contingent result of a collective epistemic agent which replicates its patterns into bubbles. One will just listen to messages that confirm her own preferences and belief and reject the different ones as unreliable. Inside the bubble there is no way to check the meaning, because the meaning is not cogenetic, it is consensual.

For instance, if I read and share a post on social media, claiming that migrants are the main criminal population, despite my initial position toward the news, there is the possibility that within my group I will start to see only posts confirming the initial fact. The fact can be proven wrong, for instance by the press, but the belief will be hard to change, as the meaning of “migrant” in my bubble is likely to continue being that of “criminal”. The collectivity will share an epistemically unjust position, to the extent that it will attribute a lessened epistemic capability to those who are not part of the group itself. How can one avoid that the group is scaffolding the “bad” epistemic skills, rather than empowering the individual (Vähämaa, 2018)?

The solution I propose is to develop an epistemic virtue based on two main principles: the ethical grounding of meaning and the cogenetic logic. The ethical grounding of meaning is directly related to the articulation between common sense and wisdom in the sense of Vico (Tateo, 2015). In a post-truth world in which we cannot appreciate the epistemic foundation of meaning, we must rely on a different epistemic virtue in order to become critical toward messages. Ethical grounding, based on the personal sense of humanity, is not of course epistemic test of reliability, but it is an alarm bell to become legitimately suspicious toward meanings. The second element of the new epistemic virtue is cogenetic logic (Tateo, 2016).

Meaning is grounded in the building of every belief as a complementary system between “A” and “non-A”. This implies that any meaning is constructed through the relationship with its complementary opposite. The truth emerges in a double dialectic movement (Silva Filho, 2014): through Socratic dialogue and through cogenetic logic. In conclusion, let me try to provide a practical example of this epistemic virtue.

The way to start to discriminate potentially fake news or the tendentious interpretations of facts would be essentially based on an ethic foundation. As in Vico’s wisdom of common sense, I would base my epistemic scrutiny on the imaginative work that allows me to access the other and on the cogenetic logic that assumes every meaning is defined by its relationship with the opposite.

Let’s imagine that we are exposed to a post on social media, in which someone states that a caravan of migrants, which is travelling from Honduras across Central America toward the USA border, is actually made of criminals sent by hostile foreign governments to destabilize the country right before elections. The same post claims that it is a conspiracy and that all the press coverage is fake news.

Finally the post presents some “debunking” pictures showing some athletic young Latino men, with their faces covered by scarves, to demonstrate that the caravan is not made by families with children, but is made by “soldiers” in good shape and who don’t look poor and desperate as the “mainstream” media claim. I do not know whether such a post has ever been made, but I just assembled elements of very common discourses circulating in the social media.

The task is no to assess the nature of this message, its meaning and its reliability. I could rely on the group as a ground for assessing statements, to scrutinize their truth and justification. However, due to the “bubble” effect, I may fall into a simple tautological confirmation, due to the configuration of the network of my relations. I would probably find only posts confirming the statements and delegitimizing the opposite positions. In this case, the fact that the group will empower my epistemic confidence is a very dangerous element.

I could limit my search for alternative positions to establish a dialogue. However, I could not be able, alone, to find information that can help me to assess the statement with respect to its degree of bias. How can I exert my skepticism in a context of post-truth? I propose some initial epistemic moves, based on a common sense approach to the meaning-making.

1) I must be skeptical of every message which uses a violent, aggressive, discriminatory language, and that such kind of message is “fake” by default.

2) I must be skeptical of every message that treats as criminals or is against whole social groups, even on the basis of real isolated events, because this interpretation is biased by default.

3) I must be skeptical of every message that attacks or targets persons for their characteristics rather than discussing ideas or behaviors.

Appreciating the hypothetical post about the caravan by the three rules above mentioned, one will immediately see that it violates all of them. Thus, no matter what is the information collected by my epistemic bubble, I have justified reasons to be skeptical towards it. The foundation of the meaning of the message will not be neither in the group nor in the person. It will be based on the ethical position of common sense’s wisdom.

Contact details:


Austin, J. L. (1975). How to do things with words. Oxford: Oxford University Press.

Bouchard, D. (2013). The nature and origin of language. Oxford: Oxford University Press.

Danesi, M. (1993). Vico, metaphor, and the origin of language. Bloomington: Indiana University Press.

Fricker, M. (2007). Epistemic injustice: Power and the ethics of knowing. Oxford University Press.

Horkheimer, M., & Adorno, T. W. (2002). Dialectic of Enlightenment. Trans. Edmund Jephcott. Stanford: Stanford University Press.

Kant, I. (1993) [1785]. Grounding for the Metaphysics of Morals. Translated by Ellington, James W. (3rd ed.). Indianapolis and Cambridge: Hackett.

Keyes, R. (2004). The Post-Truth Era: Dishonesty and Deception in Contemporary Life. New York: St. Martin’s.

Lewandowsky, S., Ecker, U. K., & Cook, J. (2017). Beyond misinformation: Understanding and coping with the “post-truth” era. Journal of Applied Research in Memory and Cognition, 6(4), 353-369.

Siemens, G. (2005). Connectivism: A learning theory for the digital age. International Journal of Instructional Technology and Distance Learning, 2(1)

Silva Filho, W. J. (2014). Davidson: Dialog, dialectic, interpretation. Utopía y praxis latinoamericana, 7(19).

Tateo, L. (2015). Giambattista Vico and the psychological imagination. Culture & Psychology, 21(2), 145-161.

Tateo, L. (2016). Toward a cogenetic cultural psychology. Culture & Psychology, 22(3), 433-447.

Thao, T. D. (2012). Investigations into the origin of language and consciousness. New York: Springer.

Vähämaa, M. (2018). Challenges to Groups as Epistemic Communities: Liminality of Common Sense and Increasing Variability of Word Meanings, Social Epistemology, 32:3, 164-174, DOI: 10.1080/02691728.2018.1458352

Vygotsky, L. S. (2012). Thought and language. Cambridge, MA: MIT press.

Wertsck, J. V. (2000). Vygotsky’s Two Minds on the Nature of Meaning. In C. D. Lee & P. Smagorinsky (eds), Vygotskian perspectives on literacy research: Constructing meaning through collaborative inquiry (pp. 19-30). Cambridge: Cambridge University Press.

Author Information: Jonathan Matheson & Valerie Joly Chock, University of North Florida,

Matheson, Jonathan; Valerie Joly Chock. “Knowledge and Entailment: A Review of Jessica Brown’s Fallibilism: Evidence and Knowledge.” Social Epistemology Review and Reply Collective 7, no. 10 (2018): 55-58.

The pdf of the article gives specific page references. Shortlink:

Photo by JBColorado via Flickr / Creative Commons


Jessica Brown’s Fallibilism is an exemplary piece of analytic philosophy. In it, Brown engages a number of significant debates in contemporary epistemology with the aim of making a case for fallibilism about knowledge. The book is divided into two halves. In the first half (ch. 1-4), Brown raises a number of challenges to infallibilism. In the second half (ch. 5-8), Brown responds to challenges to fallibilism. Brown’s overall argument is that since fallibilism is more intuitively plausible than infallibilism, and since it fares no worse in terms of responding to the main objections, we should endorse fallibilism.

What Is Fallibilism?

In the introductory chapter, Brown distinguishes between fallibilism and infallibilism. According to her, infallibilism is the claim that one knows that p only if one’s evidence entails p, whereas fallibilism denies this. Brown settles on this definition after having examined some motivation and objections to other plausible definitions of infallibilism. With these definitions in hand, the chapter turns to examine some motivation for fallibilism and infallibilism.

Brown then argues that infallibilists face a trilemma: skepticism, shifty views of knowledge, or generous accounts of knowledge. Put differently, infallibilists must either reject that we know a great deal of what we think we know (since our evidence rarely seems to entail what we take ourselves to know), embrace a view about knowledge where the standards for knowledge, or knowledge ascriptions, vary with context, or include states of the world as part of our evidence. Brown notes that her focus is on non-skeptical infallibilist accounts, and explains why she restricts her attention in the remainder of the book to infallibilist views with generous conception of evidence.

In chapter 2, Brown lays the groundwork for her argument against infallibilism by demonstrating some commitments of non-skeptical infallibilists. In order to avoid skepticism, infallibilists must show that we have evidence that entails what we know. In order to do so, they must commit to certain claims regarding the nature of evidence and evidential support.

Brown argues that non-factive accounts of evidence are not suitable for defending infallibilism, and that infallibilists must embrace an externalist, factive account of evidence on which knowing that p is sufficient for p to be part of one’s evidence. That is, infallibilists need to endorse Factivity (p is evidence only if p is true) and the Sufficiency of knowledge for evidence (if one knows that p, then p is part of one’s evidence).

However, Brown argues, this is insufficient for infallibilists to avoid skepticism in cases of knowledge by testimony, inference to the best explanation, and enumerative induction. In addition, infallibilists are committed to the claim that if one knows p, then p is part of one’s evidence for p (the Sufficiency of knowledge for self-support thesis).

Sufficiency of Knowledge to Support Itself

Chapter 3 examines the Sufficiency of knowledge for self-support in more detail. Brown begins by examining how the infallibilist may motivate this thesis by appealing to a probabilistic account of evidential support. If probability raisers are evidence, then there is some reason to think that every proposition is evidence for itself.

The main problem for the thesis surrounds the infelicity of citing p as evidence for p. In the bulk of the chapter, Brown examines how the infallibilist may account for this infelicity by appealing to pragmatic explanations, conversational norms, or an error theory. Finding each of these explanations insufficient to explain the infelicity here, Brown concludes that the infallibilist’s commitment to the Sufficiency of knowledge for self-support thesis is indeed problematic.

Brown takes on the infallibilists’ conception of evidence in Chapter 4. As mentioned above, the infallibilist is committed to a factive account of evidence, where knowledge suffices for evidence. The central problem here is that such an account has it that intuitively equally justified agents (one in a good case and one in a bad case) are not in fact equally justified.

Brown then examines the ‘excuse maneuver’, which claims that the subject in the bad case is unjustified yet blameless in their belief, and the original intuition confuses these assessments. The excuse maneuver relies on the claim that knowledge is the norm of belief. Brown argues that the knowledge norm fails to provide comparative evaluations of epistemic positions where subjects are intuitively more or less justified, and fails to give an adequate account of propositional justification when the target proposition is not believed. In addition, Brown argues that extant accounts of what would provide the subject in the bad case with an excuse are all insufficient.

In Chapter 5 the book turns to defending fallibilism. The first challenge to fallibilism that Brown examines concerns closure. Fallibilism presents a threat to multi-premise closure since one could meet the threshold for knowledge regarding each individual premise, yet fail to meet it regarding the conclusion. Brown argues that giving up on closure is no cost to fallibilists since closure ought to be rejected on independent grounds having to do with defeat.

A subject can know the premises and deduce the conclusion from them, yet have a defeater (undercutting or rebutting) that prevents the subject from knowing the conclusion. Brown then defends such defeat counterexamples to closure from a number of recent objections to the very notion of defeat.

Chapter 6 focuses on undermining defeat and recent challenges that come to it from ‘level-splitting’ views. According to level-splitting views, rational akrasia is possible—i.e., it is possible to be rational in simultaneously believing both p and that your evidence does not support p. Brown argues that level-splitting views face problems when applied to theoretical and practical reasoning. She then examines and rejects attempts to respond to these objections to level-splitting views.

Brown considers objections to fallibilism from practical reasoning and the infelicity of concessive knowledge attributions in Chapter 7. She argues that these challenges are not limited to fallibilism but that they also present a problem for infallibilism. In particular, Brown examines how (fallibilist or infallibilist) non-skeptical views have difficulty accommodating the knowledge norm for practical reasoning (KNPR) in high-stakes cases.

She considers two possible responses: to reject KNPR or to maintain KNPR by means of explain-away maneuvers. Brown claims that one’s response is related to the notion of probability one takes as relevant to practical reasoning. According to her, fallibilists and infallibilists tend to respond differently to the challenge from practical reasoning because they adopt different views of probability.

However, Brown argues, both responses to the challenge are in principle available to each because it is compatible with their positions to adopt the alternative view of probability. Thus, Brown concludes that practical reasoning and concessive knowledge attributions do not provide reasons to prefer infallibilism over fallibilism, or vice versa.

Keen Focus, Insightful Eyes

Fallibilism is an exemplary piece of analytic philosophy. Brown is characteristically clear and accessible throughout. This book will be very much enjoyed by anyone interested in epistemology. Brown makes significant contributions to contemporary debates, making this a must read for anyone engaged in these epistemological issues. It is difficult to find much to resist in this book.

The arguments do not overstep and the central thesis is both narrow and modest. It’s worth emphasizing here that Brown does not argue that fallibilism is preferable to infallibilism tout court, but only that it is preferable to a very particular kind of infallibilism: non-skeptical, non-shifty infallibilism.  So, while the arguments are quite strong, the target is more narrow.

One of the central arguments against fallibilism that Brown considers concerns closure. While she distinguishes multi-premise closure from single-premise closure, the problems for fallibilism concern only the former, which she formulates as follows:

Necessarily, if S knows p1-n, competently deduces, and thereby comes to believe q, while retaining her knowledge of p1-n throughout, then S knows q. (101)

The fallibilist threshold condition is that knowledge that p requires that the probability of p on one’s evidence be greater than some threshold less than 1. This threshold condition generates counterexamples to multiple-premise closure in which S fails to know a proposition entailed by other propositions she knows. Where S’s evidence for each premise gives them a probability that meets the threshold, S knows each of the premises.

If together these premises entail q, then S knows premises p1-n that jointly entail conclusion q. The problem is that S knowing the premises in this way is compatible with the probability of the conclusion on S’s evidence not meeting the threshold. Thus, this presents possibility for counterexamples to closure and a problem for fallibilism.

As the argument goes, fallibilists must deny closure and this is a significant cost. Brown’s reply is to soften the consequence of denying closure by arguing that it is implausible due to alternative (and independent) reasons concerning defeat. Brown’s idea is that closure gives no reason to reject fallibilism, or favor infallibilism, given that defeat rules out closure in a way that is independent of the fallibilism-infallibilism debate.

After laying out her response, Brown moves on to consider and reply to objections concerning the legitimacy of defeat itself. She ultimately focuses on defending defeat against such objections and ignores other responses that may be available to fallibilists when dealing with this problem. Brown, though, is perhaps a little too quick to give up on closure.

Consider the following alternative framing of closure:

If S knows [p and p entails q] and believes q as the result of a competent deduction from that knowledge, then S knows q.

So understood, when there are multiple premises, closure only applies when the subject knows the conjunction of the premises and that the premises entail the conclusion. Framing closure in this way avoids the threshold problem (since the conjunction must be known). If S knows the conjunction and believes q (as the result of competent deduction), then S’s belief that q cannot be false. This is the case because the truth of p entailing q, coupled with the truth of p itself, guarantees that q is true. This framing of closure, then, eliminates the considered counterexamples.

Framing closure in this way not only avoids the threshold problem, but plausibly avoids the defeat problem as well. Regarding undercutting defeat, it is at least much harder to see how S can know that p entails q while possessing such a defeater. Regarding rebutting defeat, it is implausible that S would retain knowledge of the conjunction if S possesses a rebutting defeater.

However, none of this is a real problem for Brown’s argument. It simply seems that she has ignored some possible lines of response open to the fallibilist that allows the fallibilist to keep some principle in the neighborhood of closure, which is an intuitive advantage.

Contact details:


Brown, Jessica. Fallibilism: Evidence and Knowledge. Oxford: Oxford University Press, 2018.

Author Information: Adam Morton, University of British Columbia,

Morton, Adam. “Could It Be a Conditional?” Social Epistemology Review and Reply Collective 7, no. 10 (2018): 28-30.

The pdf of the article gives specific page references. Shortlink:

Image by Squiddles via Flickr / Creative Commons


Chris Tweedt proposes that there is no independent concept of contrastive knowledge. He allows that we can meaningfully and in fact helpfully say that a person knows that p rather than q. But this is shorthand for something that can be said in a more traditional way as that the person knows that if p or q then p. I have two worries about this line. First, I do not know how to understand the conditional here. And second, I suspect that the suggested interpretation takes away the motive for using a contrastive idiom in the first place.

What Kind of Conditional?

So, could “Sophia knows that it is a goldfinch rather than a canary” mean “Sophia knows that if it is a goldfinch or a canary then it is a goldfinch”? What could “if” mean for this to be plausible? The simplest possibility is that it is a material conditional. But this cannot be right.

Sophia, who knows very little about small birds, sees an eagle land on a nearby high branch. From its size and distinctive shape she can tell immediately that it is a large raptor and not a little seed-eater such as a goldfinch or canary. That means she will know that “(Goldfinch v Canary) É Goldfinch” is true, because she knows that the antecedent is false. For the same reason she will know that “(Goldfinch v Canary) É Canary” is true. But surely she knows neither that it is a goldfinch rather than a canary nor that it is a  canary rather than a goldfinch, and more than surely not both.

Perhaps then it is a subjunctive (counterfactual) conditional: if it had been a goldfinch or a canary then it would have been a canary. I suppose there conceivably are circumstances where a high-tech procedure could transform a bird embryo into one of a different species. It might be that the most possible such procedure can transform bird embryos into canaries but never into goldfinches. Suppose this is so.

Now suppose that Sophia’s cousin Sonia is an expert ornithologist and knows at a glance what species the blue tit a metre away is. But she also knows about the embryo-transforming procedure so she knows that if it had been a goldfinch or a canary then it would have been a canary. So she knows that it is a goldfinch rather than a canary? Of course not.

The remaining possibility is that it is an indicative conditional. For many philosophers these are just material conditionals, so that won’t do. But for others they are a distinct kind. One way of paraphrasing the resulting interpretation is as “if it turns out to be a goldfinch or a canary, it will turn out to be a goldfinch”. This is still not suitable. Suppose Sonia knows immediately that it is a blue tit but is dealing with an ignorant person who doubts her judgement. She admits that there are other things it could on closer examination — which in fact is not necessary — turn out to be.

And then goldfinch would be more likely to result than canary. So she accepts this particular indicative conditional (if goldfinch or canary then goldfinch.). But she too does not know that it is a goldfinch rather than a canary, because she knows it is a blue tit. (For the differences between kinds of conditionals see Jonathan Bennett A Philosophical a Guide to Conditionals. Oxford: Clarendon Press, 2003.)

Understanding the Contrastive Idiom

These may be problems about formulating the claim rather than about the underlying intention. However I do not think that any version of the idea that all uses of “knows that p rather than q” can be represented as choosing the least wrong from a list of alternatives will work. For one use of the contrastive idiom is to describe limitations in a person’s ability to distinguish possibilities.

Consider four people with varying degrees of red/green colour blindness but with otherwise normal human colour-distinguishing capacities. (Sorry, it has to be four. For the distinctions see

Alyosha has normal r/g vision;

Boris partial capacity (say 70% of normal);

Yekaterina limited capacity (say 40% of normal);

Zenaida no r/g discrimination at all.

They are each presented with one of those familiar colour charts, one in which the most salient figure 3 in vivid green is completed to 8 in dull orange against a background of orangy murkiness. Alyosha knows that it is a 3, so that it is 3 rather than 7 and that it is 3 rather than 8. As a result he knows both that if it is 3 or 8 it is 3 and that if it is 3 or 7 it is 3. Boris can see that it is either 3 or 8; he is not sure which but thinks it is 3.

So he knows that it is 3-or-8 rather than 7 but not that it is 3 rather than a 7 (since for all he knows it might be 8 rather than 3). He also knows that if it is 3-or-8 or 7 then it is 7, and that if it is 3 or 7 then it is 3 (since the antecedent of the conditional rules out 8). Yekaterina thinks that it is 3 or 8, but she has no idea which. She knows that if it is 3 or 7 then it is 3, and that if it is 8 or 7 then it is 8, but nothing more from these possibilities.

Finally Zenaida. She hasn’t a clue about anything needing r/g discrimination and has none of this knowledge. I am assuming that all factors except for r/g discrimination are favourable to knowledge for all four people.

All of these descriptions are natural applications of the “knows rather than” construction in English. They show a fine-grained transition from full contrast to none and in particular that the “if p or q then p” versions appear and disappear at different stages in the transition than the “p rather than q” versions do. That is the point of the contrastive construction, to allow us to make these distinctions.

Contact details:


Bennett, Jonathan. A Philosophical a Guide to Conditionals. Oxford: Clarendon Press, 2003.

Tweedt, Chris. “ Solving the Problem of Nearly Convergent Knowledge.” Social Epistemology 32, 219-227: (2018).

Author Information: Peter Baumann, Swarthmore College,

Baumann, Peter. “Nearly Solving the Problem of Nearly Convergent Knowledge.” Social Epistemology Review and Reply Collective 7, no. 10 (2018): 16-21.

The pdf of the article gives specific page references. Shortlink:

Image by Forest and Kim Starr via Flickr / Creative Commons


Contrastivism (see, e.g., Schaffer 2004) is the view that knowledge is not a binary relation between a subject and a proposition but a ternary relation between a subject S, a proposition p (the proposition attributed as known and thus entailed by the knowledge attribution; we can call it the “target proposition”) and an incompatible (cf. Rourke 2013, sec.2) and false contrast proposition q (a “contrast”).[1]

The form of a knowledge attribution is thus not S knows that p but S knows that p rather than q. According to contrastivism, it’s elliptical, at least, to say that Chris knows that that bird is a goldfinch. Rather, we should say something like the following: Chris knows that that bird is a goldfinch rather than a raven. Chris might not know that that bird is a goldfinch rather than a canary. There can, of course be more than one contrasting proposition; in this case we can consider the disjunction of all the contrasting propositions to constitute the contrast proposition.

A Problem and Tweedt’s Proposed Solution

Chris Tweedt’s thought-provoking “Solving the Problem of Nearly Convergent Knowledge” discusses one kind of argument against the binary view and in favor of contrastivism. The argument (see Schaffer 2007) is based on the claim that knowing that p consists in knowing the answer to a question of the form Is p rather than q the case? (“Is this bird a goldfinch rather than a raven?”; “Is it a goldfinch rather than a canary?”). Put differently, knowing that p consists in knowing the correct answer to a multiple choice question (“What bird is this? A: A goldfinch; B: A raven”; What bird is this? A: A goldfinch; B: A canary”).

The binary account faces a problem because it has to claim that if one knows the answer to one such question (“Is it a goldfinch rather than a raven?”) then one also knows the answer to the other question (“Is it a goldfinch rather than a canary?”). However, one might only be able to answer one question but not the other. This is the problem of convergent knowledge. This, argues Schaffer, speaks in favor of contrastivism.

Some defenders of the binary view (see Jespersen 2008; Kallestrup 2009) have proposed the following way out: One does not know the same proposition when one knows the answers to different contrastive (multiple choice) questions which share a “target” (a target proposition). Rather, the corresponding knowledge has the form S knows that (p and not q). Our subject might know that that bird is a goldfinch and not a raven while it might not know that it is a goldfinch and not a canary.

Schaffer (2009) has a response to this: Even though there is no convergence of knowledge here there is “near convergence” which is still bad enough. Using the principle of closure of knowledge under known entailment[2] one can easily acquire knowledge of the second proposition on the basis of knowledge of the first. If Chris knows that that bird is a goldfinch and not a raven, then Chris also knows or can easily come to know, according to the binary view, that that bird is a goldfinch.

Since Chris also knows that whatever is a goldfinch is not a canary, he also knows or can easily come to know that that bird is not a canary. So, he knows or can easily come to know that that bird is a goldfinch and not a canary. Given that this is implausible, the problem of convergent knowledge is reincarnated as the problem of “nearly convergent knowledge”.

Tweedt’s ingenuous reply in favor of the binary account (see also van Woudenberg 2008) proposes to analyze the known answer to a contrastive (multiple choice) question as having conditional form:

(0) If p or q, then p.[3]

Question: Is that bird a goldfinch rather than a raven? Answer: If it is a goldfinch or a raven, then it is a goldfinch!

Tweedt claims that this solves the problem of convergent knowledge because the answer to the question “Is that bird a goldfinch rather than a raven?”, namely

(1) If that bird is a goldfinch or a raven, then it’s a goldfinch,

is not “a few quick closure steps away” (see Tweedt 2018, 220) from the answer to the question “Is that bird a goldfinch rather than a canary?”, namely

(2) If that bird is a goldfinch or a canary, then it’s a goldfinch.

A Problem with Tweedt’s Proposal

Tweedt does not add an explicit argument to his claim that (2) isn’t just a few easy closure steps away from (1). Here is an argument that (2) is indeed just a few easy closure steps away from (1). If that’s correct, then Tweedt’s proposal fails to solve the problem of nearly convergent knowledge.

Let “g”, “r” and “c” stand in for “That bird is a goldfinch”, “That bird is a raven”, and “That bird is a canary” respectively. We can then, following Tweedt, assume (about some subject S) that

(3) S knows that if g or r, then g.

The proposition g is the target proposition here, not r (in the latter case our subject would know that if g or r, then r, instead). Since targets and contrasts are mutually incompatible, we may also assume that

(4a) S knows that if g, then not r;

(4b) S knows that if g, then not c.

Finally, we may assume that

(5) S knows that g or r.

To be sure, one can ask contrastive questions where both propositions are false: Is Einstein rather than Fido the dog the inventor of the telephone? One might want to answer that Einstein rather than Fido invented the telephone (whether one also believes falsely or doesn’t believe that Einstein invented the telephone).

However, this is a deviant case not relevant here because we are interested in cases where one of the contrasting propositions is true and particularly in knowledge that p (where p is the target). If that knowledge is construed in a binary way, then it involves knowledge of one of the contrasting propositions (p) that it is true; if it is construed as knowledge that p rather than q, then it still obeys the factivity principle for knowledge and thus entails that p. So, we can assume here that

g or r

is true.[4] We may also assume that in standard cases the subject can know this. Hence:

(5) S knows that g or r.[5]

A closure principle like (Closure) together with (3) and (5) entails

(6) S knows that g.[6]

(Closure) together with (4b) and (6) entails

(7) S knows that not c.

So, there are only a few quick and easy “closure steps” to the implausible (7).[7] And we can add that disjunction introduction will allow the subject to come to know (on the basis of (6)) that g or c

(8) S knows that g or c.

(We could also argue for (8) along the lines of the argument above for (5)). Conjunction introduction together with (6) and (8) will allow the subject to know that (g or c) and g:

(9) S knows that (g or c) and g.

Since whenever a conjunction is true, a corresponding conditional is true, the subject can also come to know that

If g or c, then g.

In other words:

(10) S knows that if g or c, then g.[8]

There are then also quick and easy closure steps leading from Tweedt’s (1) to (2). So, the problem of nearly convergent knowledge remains unsolved.

Defending Tweedt?

There is more than one strategy for Tweedt to defend his proposal of a solution to the problem of nearly convergent knowledge. One would be to modify the closure principle in such a way that certain steps are not allowed any more. For instance, one could try to argue (4b) and (6) don’t lead to (7) because a valid closure principle doesn’t allow knowledge-producing inferences from easy-to-know propositions to hard-to-know propositions.

This kind of idea is well-known from discussions about skepticism: I might know that I have hands, and I might also know that if I have hands, then I am not merely hallucinating that I have hands, but I don’t know that I am not merely hallucinating that I have hands. Fred Dretske and Robert Nozick as well as some others have argued for such a view (see Dretske 2005 and Nozick 1981, ch.3). However, I am not sure whether Tweedt wants to choose this strategy. And it doesn’t seem easy to find a modification of the closure principle that is not ad hoc and has independent reasons in its favor.

Another strategy would be to identify other analyses of the answer to a contrastive (multiple choice) question. Perhaps one can improve on Tweedt’s response in a way similar to the one in which he attempts to improve on Kallestrup’s (and Jespersen’s) response to the original problem of convergent knowledge. I have to leave open here whether there is an analysis that does the trick, and what it could be (see, e.g., Steglich-Petersen 2015).

Could one take Tweedt’s conditional (0) not as a material conditional but rather as a subjunctive conditional? I am afraid that this would constitute a change of topic. Knowledge is factive and what would be the case (P) if something else (Q) were the case does not tell us anything about whether P or Q is the case, even if the corresponding subjunctive conditional is indeed true.

It might be more promising to explore the potential of a complaint about question begging: Isn’t Schaffer’s diagnosis that one can know (1) without knowing (2) already presupposing the truth of contrastivism? Why should one believe that there is a problem with knowing (2) but not with knowing (1) if not because one has already accepted contrastivism about knowledge?

One final side remark on an alleged advantage of binary accounts like Tweedt’s. He argues (see Tweedt 2018, 223) that contrastivism doesn’t take the skeptical problem seriously (enough) and rather deflates it; one might even want to say that contrastivism changes the topic. According to contrastivism I can know the Moorean proposition that I have hands rather than stumps even if I do not know the anti-skeptical proposition that I have hands rather than am merely hallucinating hands. Closure does not support any claim that if I know the one, then I know the other, too. Tweedt thinks this is a disadvantage of contrastivism. However, contrastivists like Schaffer would see this as an advantage. It seems to me that both ways of looking at the anti-skeptical potential of contrastivism have something going for them. In this context, it might be better to leave the question open whether skepticism can be deflated or not. (Similar points will apply to Tweedt’s remarks concerning the debate about expert disagreement; see Tweedt 2018, 223)


Ingenuous as Tweedt’s proposal is, it does not, I think, solve the problem of nearly convergent knowledge. However, this does not mean that a ternary account of knowledge has to be preferred to a binary account. I think that there are serious problems for contrastivism that make the binary account the better options. But this is something for another occasion.

Contact details:


Dretske, Fred I. 2005, The Case against Closure, Matthias Steup and Ernest Sosa (eds.) Contemporary Debates in Epistemology, Malden, MA: Blackwell, 13-26.

Jespersen, Bjørn 2008, Knowing that p rather than q, Sorites 20, 125-134.

Kallestrup, Jesper 2009, Knowledge-wh and the Problem of Convergent Knowledge, in: Philosophy and Phenomenological Research 78, 468-476.

Nozick, Robert 1981, Philosophical Explanations, Cambridge, MA: Harvard University Press.

Rourke, Jason 2013, A Counterexample to the Contrastive Account of Knowledge, Philosophical Studies 162, 637-643.

Schaffer, Jonathan 2004, From Contextualism to Contrastivism, Philosophical Studies 119, 73-103.

Schaffer, Jonathan 2007, Knowing the Answer, Philosophy and Phenomenological Research 75, 383-403.

Steglich-Petersen, Asbjørn 2015, Knowing the Answer to a Loaded Question, in: Theoria 81, 97-125.

Tweedt, Chris 2018, Solving the Problem of Nearly Convergent Knowledge, Social Epistemology 32, 219-227.

van Woudenberg, René 2008, The Knowledge Relation: Binary or Ternary?, Social Epistemology 22, 281-288.

[1] We can allow for a different kind of contrastive knowledge relation where the contrast can also be true. Suppose I know of Jo, the president of the cheese club and also my dentist, that Jo is my dentist. Since I have no clue who might be the president of the cheese club, it could be appropriate to express all this by saying that I know that Jo is my dentist rather than the president of the cheese club. However, against this speaks that the latter is best understood as saying that I know that Jo is my dentist rather than that I know that Jo is the president of the cheese club. But even if there was such an alternative kind of contrastivity of knowledge, we can leave it aside here.

[2] Here is a basic version: (Closure) If S knows that p, and if S knows that p entails q, then S knows that q. Whistles and bells should be added but nothing depends on these here; we can use (Closure) or other simple variants of it here.

[3] Tweedt adds that not all knowledge or all answers to questions are conditional in form (see Tweedt 2018, 222).

[4] See also Tweedt 2018, 224, fn.11 and 225, fn.14. Given (4a) and therefore also given that if g, then not r, we can also rule out that both propositions are true. Could r be true and g be false? Sure, but then r would be the target proposition, not g. This would not constitute a different case.

[5] Even if one insists that knowledge of the answer to a contrastive question is compatible with the lack of truth of any of the contrasting propositions, one still has to accept that there are other cases where there is a true target. And for such cases one still needs a convincing solution of the problem of nearly convergent knowledge.

[6] A different route to (6) uses (5) and (8) below together with the claim that all contrasting propositions are mutually incompatible. However, one might have doubts about the latter assumption and allow for propositions in the contrast set to be mutually compatible (as long as they are incompatible with the target proposition). I want to leave this issue open here and will thus not put weight on this alternative route to (6). – Here is still another route to (6). If it is true (following (3)) that if g or r, then g, (thus ruling out the case in which g is false and r is true) and if it is also true (following (4a)) that if g, then not r (thus ruling out the case in which both g and r are true), and if, finally, r is the disjunction of all the propositions contrasting with g (thus ruling out the case in which both g and r are false), then we are left with only one case: the case in which g is true and r is false. Since this is a case where g is true, S can come to know g on the basis of the considerations just given. However, in many cases the contrast set does not contain all propositions except the target proposition. In all these cases, we need to use another route to (6).

[7] If one replaces c by some proposition about the obtaining of a skeptical scenario (like An evil demon makes me hallucinate goldfinches), then one gets to even more drastic cases and implications.

[8] Again, if one replaces c by some proposition about the obtaining of a skeptical scenario (like An evil demon makes me hallucinate goldfinches), then one gets to even more drastic conclusions like the following one: S knows that if he is looking at a goldfinch or is suffering from a demon-induced hallucination of a goldfinch, then he is looking at a goldfinch. Hence, given the above, S can also come to know he is looking at a goldfinch and not suffering from a demon-induced hallucination of a goldfinch.

Author Information: Robin McKenna, University of Liverpool,

McKenna, Robin. “McBride on Knowledge and Justification.” Social Epistemology Review and Reply Collective 7, no. 9 (2018): 53-59.

The pdf of the article gives specific page references. Shortlink:

Image by Ronan Shahnav via Flickr / Creative Commons


I would like to thank the editors of the Social Epistemology Review and Reply Collective for giving me the opportunity to review Mark McBride’s rich and rewarding book. To begin, I will give a—fairly high-level—overview of its contents. I will then raise some concerns and make some (mildly) critical comments.


The book is split into two parts. Part 1 concerns the issue of basic knowledge (and justification), whereas the second concerns (putative necessary) conditions on knowledge (specifically, conclusive reasons, sensitivity and safety conditions). We can start with Part 1. As McBride defines it, basic knowledge is “knowledge (or justification) which is immediate, in the sense that one’s justification for the known proposition doesn’t rest on any justification for believing other propositions” (p. 1).

Two central issues in Part 1 are (i) what, exactly, is wrong with Moore’s “proof” of the external world (Chapter 1) (ii) what, exactly, is wrong with inferences that yield “easy knowledge” (Chapters 2-3). Take these arguments, which for ease of reference I’ll call MOORE and EASY-K respectively:


(Visual appearance as of having hands).
1-M. I have hands.
2-M. If I have hands, an external world exists.
3-M. An external world exists.


(Visual appearance as of a red table).
1-EK. The table is red.
2-EK. If the table is red, then it is not white with red lights shining on it.
3-EK. The table is not white with red lights shining on it.

It seems like a visual appearance as of having hands can give one knowledge of 1-M, and 2-M seems to be knowable a priori. But it seems wrong to hold that one can thereby come to know 3-M. (And mutatis mutandis for EASY-K and 3-EK).

I want to single out three of McBride’s claims about MOORE and EASY-K. First, it is commonly taken that “dogmatist” responses to MOORE (such as Pryor 2000) are at a disadvantage with respect to “conservative” responses (such as Wright 2004). The dogmatist holds that having a visual appearance as of hands provides immediate warrant for 1-M, whereas the conservative holds that one can have warrant for 1-M only if one has a prior entitlement to accept 3-M. Thus the dogmatist seems forced to accept that warrant can “transmit” from the premises of MOORE to the conclusion, whereas the conservative can deny that warrant transmission occurs.

In Chapter 1 McBride turns this on its head. First, he argues that, while a conservative such as Crispin Wright can maintain that the premises of MOORE don’t transmit “non-evidential” warrant to the conclusion, he must allow that “evidential” warrant does transmit from the premises to the conclusion. Second, he argues that Wright cannot avail himself of what McBride (following Davies 2004) takes to be a promising diagnosis of the real problem with MOORE. According to Martin Davies, MOORE is inadequate because it is of no use in the epistemic project of settling the question whether the external world exists. But, for Wright, there can be no such project, because the proposition that the external world exists is the “cornerstone” on which all epistemic projects are built.

Second, in Chapter 3 McBride seeks to show that the dogmatist can supplement Davies’ account of the problem with Moore’s proof in order to diagnose the problem with EASY-K. According to McBride, EASY-K is problematic not just in that it is of no use in settling the question whether the table is not white with red lights shining on it, but also in that there are all sorts of ways in which one could settle this question (e.g. by investigating the lighting sources surrounding the table thoroughly).

Thus, EASY-K is problematic in a way that MOORE isn’t: while one could avail oneself of a better argument for the conclusion of EASY-K, it is harder to see what sort of argument could improve on MOORE.

Third, while Part 1 is generally sympathetic to the dogmatist position, Chapter 5 argues that the dogmatist faces a more serious problem. The reader interested in the details of the argument should consult Chapter 5. Here, I just try to explain the gist. Say you endorse a closure principle on knowledge like this:

CLOSURE: Necessarily, if S knows p, competently deduces q from p, and thereby comes to believe q, while retaining knowledge of p throughout, then S knows q (p. 159).

It follows that, if one comes to know 1-EK (the table is red) by having an appearance as of a red table, then competently deduces 3-EK (the table is not white with red lights shining on it) from 1-EK while retaining knowledge of 1-EK, then one knows 3-EK. But—counter-intuitively—having an appearance as of a red table can lower the credence one ought to have in 3-EK (see pp. 119-20 for the reason why).

It therefore seems inarguable that, if you are in a position to know 3-EK after having the appearance, you must have been in a position to know the 3-EK prior to the appearance. So it seems like the conservative position must be right after all. In order for your appearance as of a red table to furnish knowledge that there is a red table you must have been in a position to know that the table was not white with red lights shining on it prior to having the appearance as of a red table.

The second part of McBride’s book concerns putative (necessary) conditions on knowledge, in particular conclusive reasons (Chapter 6), sensitivity (Chapter 7) and safety (Chapter 8). McBride dedicates a chapter to each condition; the book finishes with a (brief) application of safety to legal knowledge (Chapter 9). While most epistemologists tend to argue that either sensitivity or (exclusive) safety are a (necessary) condition on knowledge, McBride provides a (qualified) defense of both.

In the case of sensitivity, this is in part because, if sensitivity were a condition on knowledge, then—as Nozick (1981) famously held—CLOSURE would be false, and so the argument against dogmatism (about knowledge) in Chapter 5 would be disarmed. Because of the centrality of sensitivity to the argument in Part 1, and because the chapters on conclusive reasons and sensitivity revolve around similar issues, I focus on sensitivity in what follows.

Here is an initial statement of sensitivity:

SENSITIVITY: S knows p only if S sensitively believes p, where S sensitively believes p just in case, were p false, S would not believe p (p. 160).

Chapter 7 (on sensitivity) is largely concerned with rebutting an objection from John Hawthorne (2004) to the effect that the sensitivity theorist must also reject these two principles:

EQUIVALENCE: If you know a priori that p and q are equivalent and you know p, then you are in a position to know q.

DISTRIBUTION: If one knows p and q, then one is in a position to know p and to know q.

Suppose I have an appearance as of a zebra. So I know:

(1) That is a zebra.

By EQUIVALENCE I can know:

(2) That is a zebra and that is not a cleverly disguised mule.

So by DISTRIBUTION I can know:

(3) That is not a cleverly disguised mule.

But, by SENSITIVITY, while I can know (1), I can’t know (3) because, if I were looking at a cleverly disguised mule, I would still believe I was looking at a zebra. Hawthorne concludes that the sensitivity theorist must deny a range of plausible principles, not just CLOSURE.

McBride’s basic response is that, while SENSITIVITY is problematic as stated, it can be modified in such a way that the sensitivity-theorist can deny EQUIVALENCE but keep DISTRIBUTION. More importantly, this rejection of EQUIVALENCE can be motivated on the grounds that initially motivate SENSITIVITY. Put roughly, the idea is that simple conjunctions like (4) already cause problems for SENSITIVITY:

(4) I have a headache and I have all my limbs.

Imagine you form the belief in (4) purely from your evidence of having a headache (and don’t worry about how this might be possible). While you clearly don’t know (4), your belief does satisfy SENSITIVITY, because, if (4) were false, you wouldn’t still believe it (if you didn’t have a headache, you wouldn’t believe you did, and so you wouldn’t believe (4)).

The underlying problem is that SENSITIVITY tells you to go the nearest possible world in which the relevant belief is false and asks what you believe there, but a conjunctive belief is false so long as one of the conjuncts is false, and it might be that one of the conjuncts is false in a nearby possible world, whereas the other is false in a more distant possible world. So the sensitivity theorist needs to restrict SENSITIVITY to atomic propositions and add a new condition for conjunctive propositions:

SENSITIVITY*: If p is a conjunctive proposition, S knows p only if S believes each of the conjuncts of p sensitively (p. 167).

If we make this modification, the sensitivity theorist now has an independent reason to reject EQUIVALENCE, but is free to accept DISTRIBUTION.

Critical Discussion

While this only touches on the wealth of topics discussed in McBride’s book, I will now move on to the critical discussion. I will start by registering two general issues about the book. I will then develop two criticisms in a little more length, one for each part of the book.

First, while the book makes compelling reading for those already versed in the literatures on transmission failure, easy knowledge and modal conditions on knowledge, the central problematics are rarely motivated at any length. Moreover, while McBride does draw numerous (substantive) connections between the chapters, the book lacks a unifying thesis. All this to say: This is maybe more of a book for the expert than the novice. But the expert will find a wealth of interesting material to chew over.

Second, readers of the Collective might find the individualism of McBride’s approach striking. McBride is almost exclusively concerned with the epistemic statuses of individuals’ beliefs, where those beliefs are formed through simple processes like perception and logical inference. The one part of the book that does gesture in a more social direction (McBride’s discussion of epistemic projects, and the dialectical contexts in which they are carried out) is suggestive, but isn’t developed in much detail.

Turning now to more substantive criticisms, in Part 1 McBride leans heavily on Davies’ solution to the problem with MOORE. I want to make two comments here. First, it is natural to interpret Davies’ solution as an inchoate form of contextualism (DeRose 1995; Lewis 1996): whether MOORE (and EASY-K?) transmits warrant to its conclusion depends on the context in which one runs the inference, in particular, the project in which one is engaged.

This raises a host of questions. For example: does McBride hold that, if we keep the context (project) fixed, no transmission failure occurs? That is: if we’re working with the (easier) project of deciding what to believe, does an instance of MOORE transmit warrant from premises to conclusion? If so, then if we’re working with the (harder) project of settling the question, does an instance of MOORE fail to transmit warrant? (This would fit with the more general contextualist line in response to the skeptical problem, so this is only a request for clarification).

Second, and more importantly, we need to distinguish between the project of fully settling the question whether p and the project of partially settling the question whether p. Let’s grant McBride (and Davies) that someone who runs through an instance of MOORE has not fully settled the question whether there is an external world. But why think that—at least by the dogmatist’s lights—they haven’t partially settled the question? If dogmatism is true, then having the appearance as of a hand provides immediate warrant for believing that one has a hand, and so, via MOORE, for believing that there is an external world.

McBride (like many others) finds this conclusion unpalatable, and he invokes the distinction between the project of deciding what to believe and the project of settling the question in order to avoid it. But this distinction is overly simplistic. We can settle questions for different purposes, and with different degrees of stability (cf. “the matter is settled for all practical purposes”). The dogmatist seems forced to allow that MOORE is perfectly good for settling the question of whether there is an external world for a range of projects, not just one.

(I have a parallel worry about the solution to the problem of easy knowledge. Let’s grant McBride that one problem with EASY-K is that there are far better ways of trying to establish that the table is not white but bathed in red light. But why think that—at least by the dogmatist’s lights—it isn’t a way of trying to establish this? To point out that there are better ways of establishing a conclusion is not yet to show that this particular way is no way at all of establishing the conclusion).

Finally, in his response to Hawthorne’s objection to the sensitivity theorist McBride is at pains to show that his modification of SENSITIVITY isn’t ad hoc. To my mind, he does an excellent job of showing that the sensitivity theorist should reject EQUIVALENCE for reasons entirely independent of Hawthorne’s objection.

This suggests (at least to me) that the problem is not one of ad hocness, but rather that sensitivity theorists are forced to endorse a wide range of what Keith DeRose (1995) calls “abominable conjunctions” (cf. “I know that I have hands, but I don’t know that I’m not a handless brain in a vat”). DeRose’s own response to this problem is to embed something like SENSITIVITY in a contextualist theory of knowledge attributions. DeRose proposes the following “rule”:

Rule of Sensitivity: When it’s asserted that S knows (or doesn’t know) p, then, if necessary, enlarge the sphere of epistemically relevant worlds so that it at includes the closest worlds in which p is false (cf 1995, 37).

His idea is that, when the question of whether S knows p becomes a topic of conversation, we expand the range of worlds in which S’s belief must be sensitive. Imagine I assert “I know that I have hands”. In order for this assertion to be true, it must be the case that, if I didn’t have hands, I wouldn’t believe that I did.

But now imagine I assert “I know that I’m not a handless brain in a vat”. In order for this new assertion to be true, it must be the case that, if I were a handless brain in a vat, I wouldn’t believe that I wasn’t. Plausibly, this will not be the case, so I can’t truly assert “I know that I’m not a handless brain in a vat”. But no abominable conjunction results, because I can no longer truly assert “I know that I have hands” either.

My suggestion is that, if McBride were to adopt DeRose’s contextualist machinery, he would not only have a way of responding to the problem of abominable conjunctions, but also an interesting modification to DeRose’s “rule of sensitivity”.

For note that DeRose’s rule seems subject to the same problem McBride sees with SENSITIVITY: when I assert “I have a headache and I have all my limbs” we only need to expand the range of worlds to include worlds in which I don’t have a headache, and so my assertion will remain true in the updated context created by my assertion. Further, adopting this suggestion would furnish another link between Part 1 and Part 2: solving the problem of basic knowledge and formulating a satisfactory sensitivity condition both require adopting a contextualist theory of knowledge attributions.

Contact details:


Davies, Martin. 2004. ‘Epistemic Entitlement, Warrant Transmission and Easy Knowledge’. Aristotelian Society Supplementary Volume 78 (1): 213–245.

DeRose, Keith. 1995. ‘Solving the Skeptical Problem’. Philosophical Review 104 (1): 1–52.

Hawthorne, John. 2004. Knowledge and Lotteries. Oxford University Press.

Lewis, David. 1996. ‘Elusive Knowledge’. Australasian Journal of Philosophy 74 (4): 549–67.

Nozick, Robert. 1981. Philosophical Explanations. Harvard University Press.

Pryor, James. 2000. ‘The Skeptic and the Dogmatist’. Noûs 34 (4): 517–549.

Wright, Crispin. 2004. ‘Warrant for Nothing (and Foundations for Free)?’ Aristotelian Society Supplementary Volume 78 (1): 167–212.