Defining Knowledge

This paper reconstructs the origins of Gettier-style epistemology, highlighting the philosophical and methodological debates that led to its development in the 1960s. Though present-day epistemologists assume that the search for necessary and sufficient conditions for knowledge began with Gettier’s 1963 argument against the JTB-definition, I show that this research program can be traced back to British discussions about knowledge and analysis in the 1940s and 1950s. I discuss work of, among others, Bertrand Russell, G. E. Moore, A. J. Ayer, Norman (...) Malcom, and A. D. Woozley, showing how exchanges between different schools of analytic philosophy gave rise to new ideas about the nature of knowledge and analysis. Finally, I turn to Gettier's intellectual development and argue that his paper was influenced by some of these debates, suggesting that even his interpretation of Plato’s definition of knowledge can be traced back to discussions in this period. (shrink)

Post-Gettier epistemology is increasingly modalized epistemology – proposing and debating modally explicable conditionals with suitably epistemic content (an approach initially inspired by Robert Nozick's 1981 account of knowledge), as needing to be added to 'true belief' in order to define or understand knowing's nature. This Element asks whether such modalized attempts – construed as responding to what the author calls Knowing's Further Features question (bequeathed to us by the Meno and the Theaetetus) – can succeed. The answer is that they (...) cannot. Plato's and Aristotle's views on definition reinforce that result. Still, in appreciating this, we might gain insight into knowing's essence. We might find that knowledge is, essentially, nothing more than true belief. (shrink)

Can knowledge be defined? We expound an argument of John Cook Wilson's that it cannot. Cook Wilson's argument connects knowing with having the power to inquire. We suggest that if he is right about that connection, then knowledge is, indeed, indefinable.

This collection of newly commissioned essays, edited by NYU philosophers Paul Boghossian and Christopher Peacocke, resumes the current surge of interest in the proper explication of the notion of a priori. The authors discuss the relations of the a priori to the notions of definition, meaning, justification, and ontology, explore how the concept figured historically in the philosophies of Leibniz, Kant, Frege, and Wittgenstein, and address its role in the contemporary philosophies of logic, mathematics, mind, and science. The editors’ Introduction (...) familiarizes the reader with the issues that are to be explored in detail in later parts of the anthology. (shrink)

I develop a challenge to reductive views of knowing that φ that appeal to what I call a gradable property. Such appeal allows for properties that are intrinsically very similar to the property of knowing that φ, but differ significantly in their normative significance. This violates the independently plausible claim Pautz (2017) labels the small difference principle.

The discrepancy between individual women and the stereotypes attributed to the group as a ‎whole has become progressively greater and more explicit over the course of history. The stereotypes remain the same age-old ‎allegations whilst the ‎developments in the occupations of women and the traits they have opportunity to express have increased the distance between women and those ascribed traits. Stereotypes’ abstention from revision in light of contrary evidence constitutes an epistemic paradox for it entails conflict between the stereotypical knowledge (...) and empirical evidence, as well as between the stereotypical knowledge and other empirical knowledges. This paradox of stubbornness also raises the question as to the epistemic source of stereotypes. For, people at young ages encounter evidence which should have formed a more complex knowledge regarding women rather than the pervasive stereotypical knowledge. It is this extremity of absurdness of stereotypes regarding women that is utile to understanding stereotypes as a whole. The epistemic paradox that is engrained in all stereotypes is exposed uncompromisingly by this group. The paradox cannot be dismissed with excuses of having a small basis of evidence, such as may be said regarding other social groups with which one may have had minimal or no contact. Thus, stereotypes of women provide a limit case to understanding the epistemology of this paradoxical form of knowledge. The traits and epistemic phenomena which render stereotypes epistemically puzzling and intriguing is the relationship between knowledges. Stereotypical knowledge regarding women as a group conflict with one’s experience-founded knowledges of particular women, deeming the corporate body of knowledge incoherent. Quine’s theory of knowledge, with its holistic empirical approach endorsing conceptual schemes, provides fertile ground for this analysis. The novelty in his account is his establishment of the criteria of coherency, which shifts the focal point of epistemic inquiry away from the adequacy of individual knowledges with empirical evidence to the intra-knowledge relationships themselves. In his empiricism, Quine rather examines the interactions between knowledges and the overarching coherence of the body of knowledge as a holistic unit. Quine creates place in his account for mechanism which provide for the epistemic incongruences of stubbornness and conflict found between stereotypical knowledges and empirical evidence. These very mechanisms are what this paper requests to examine. Quine, ultimately, formulates knowledge as a collectively held fabric consisting of relations and of posits – socially constructed mechanisms which are empirically-irreducible and implemented pragmatically for the organisation of empirical evidence. According to Quine, the fabric formation is a conceptual scheme sourced in social heritage. People are bestowed with an eclectic framework of ‎knowledge to pragmatically merge between an inherited, collective conceptual scheme and the personally experienced empirical evidence. This paper will delve into Quine’s fabric of knowledge, its relations, and inner-mechanisms. The finding of stereotypes to be an age-old posit entrenched pragmatically – thus stubbornly – in the collective conceptual scheme, will explain the epistemic paradoxes they entail and offer insight to their revision in light of empiric reality and its women. (shrink)

(Philosophical Journal Entry) This short paper is a reflection on the lecture “What is Philosophy?” by Robert Brandom at the Royal Institute of Philosophy. In reflection, this lecture provokes an epistemic thought: understanding is a foundational epistemic aspect, and should take precedence, or even replace truth as a condition in the traditional analysis of knowledge.

What is knowledge? I this paper I defend the claim that knowledge is justified true belief by arguing that, contrary to common belief, Gettier cases do not refute it. My defence will be of the anti-luck kind: I will argue that (1) Gettier cases necessarily involve veritic luck, and (2) that a plausible version of reliabilism excludes veritic luck. There is thus a prominent and plausible account of justification according to which Gettier cases do not feature justified beliefs, and therefore, (...) do not present counterexamples to the tripartite analysis. I defend the account of justification against objections, and contrast my defence of the tripartite analysis to similar ones from the literature. I close by considering some implications of this way of thinking about justification and knowledge. (shrink)

According to an influential recent view, S is propositionally justified in believing p iff S is in no position to know that S is in no position to know p. I argue that this view faces compelling counterexamples.

John Cook Wilson is an important predecessor of contemporary knowledge first epistemologists: among other parallels, he claimed that knowledge is indefinable. We reconstruct four arguments for this claim discernible in his work, three of which find no clear analogues in contemporary discussions of knowledge first epistemology. We pay special attention to Cook Wilson’s view of the relation between knowledge and forms of thinking (like belief). Claims of Cook Wilson’s that support the indefinability of knowledge include: that knowledge, unlike belief, straddles (...) an active/passive divide; that, rather than entailing belief, knowledge excludes belief; and that understanding forms of thinking other than knowledge (such as belief) depends on understanding knowledge. Reflecting on Cook Wilson’s framework highlights underappreciated concerns relevant to any attempt to define knowledge. (shrink)

Can epistemic luck be captured by modal conditions such as safety from error? This paper answers ‘no’. First, an old problem is cast in a new light: it is argued that the trivial satisfaction associated with necessary truths and accidentally robust propositions is a symptom of a more general disease. Namely, epistemic luck but not safety from error is hyperintensional. Second, it is argued that as a consequence the standard solution to deal with this worry, namely the invocation of content (...) variation, fails. Third, it is considered whether the condition can serve some restricted theoretical role; the hypothesis is rejected. Finally, it is tentatively suggested that epistemic luck’s hyperintensionality derives from its being an explanatory notion, and an analogy is drawn with failures of probabilstic conceptions of explanation in the philosophy of science. (shrink)

Quite likely the most sacrosanct principle in epistemology, it is near-universally accepted that knowledge is factive: knowing that p entails p. Recently, however, Bricker, Buckwalter, and Turri have all argued that we can and often do know approximations that are strictly speaking false. My goal with this paper is to advance this nascent non-factive project in two key ways. First, I provide a critical review of these recent arguments against the factivity of knowledge, allowing us to observe that elements of (...) these arguments mutually reinforce respective weaknesses, thereby offering the non-factive project a much stronger foundation than when these arguments were isolated. Next, I argue tentatively in favor of Bricker’s truthlikeness framework over the representational adequacy account favored by Buckwalter and Turri. Taken together, while none of this constitutes a knock-down argument against factivity, it does allow us to quiet some of the more immediate worries surrounding the non-factive project. (shrink)

The distinction between true belief and knowledge is one of the most fundamental in philosophy, and a remarkable effort has been dedicated to formulating the conditions on which true belief constitutes knowledge. For decades, much of this epistemological undertaking has been dominated by a single strategy, referred to here as the modal approach. Shared by many of the most widely influential constraints on knowledge, including the sensitivity, safety, and anti-luck/risk conditions, this approach rests on a key underlying assumption — the (...) modal profiles available to known and unknown beliefs are in some way asymmetrical. The first aim of this paper is to deconstruct this assumption, identifying its plausibility with the way in which epistemologists frequently conceptualize human perceptual systems as excluding certain varieties of close error under conditions conducive to knowledge acquisition. The second aim of this paper is to then argue that a neural phase phenomenon indicates that this conceptualization is quite likely mistaken. This argument builds on the previous introduction of this neural phase to the context of epistemology, expanding the use of neural phase cases beyond relatively narrow questions about epistemic luck to a much more expansive critique of the modal approach as a whole. (shrink)

A new definition of lying is gaining traction, according to which you lie only if you say what you know to be false. Drawing inspiration from “New Evil Demon” scenarios, I present a battery of counterexamples against this “Knowledge Account” of lying. Along the way, I comment upon the methodology of conceptual analysis, the moral implications of the Knowledge Account, and its ties with knowledge-first epistemology.

The paper entitled "Knowledge, Science, and Science of Knowledge" uses two relevant texts from German idealism to ask whether philosophy is a science. It is first argued that science presupposes knowledge, but that the concept of knowledge has long been subject to strong scepticism due to Fitch's paradox of knowability and especially the Gettier problem. Only in recent years have historians of philosophy made it clear that the so-called standard analysis of knowledge was not even advocated by many classical authors. (...) This is also the case with the texts under investigation: Fichte's early Wissenschaftslehre and Schopenhauer's Berlin Lectures. Both texts argue for a very different concept of knowledge, which then also determines the concept of science and philosophy. Fichte argues that philosophy must be founded from axioms and is therefore a subordinating science. Schopenhauer argues against this and points out that philosophy can only be a coordinating science. The last part of the paper argues that Fichte's and Schopenhauer's definitions of philosophy as a coordinating or subordinating science can still be applied today. (shrink)

This paper is a reconstruction and analysis of Thomas Reid’s epistemology, based upon an examination of his extant manuscripts and publications. I argue that, in Reid’s view, a certain degree of “evidence” (or, as I shall say, ‘epistemic justification’) is that which distinguishes mere true belief from knowledge; and that this degree of justification may be ascribed to a person’s belief if and only if (i) the evidence upon which her belief is grounded is such that she holds it with (...) “certainty”; (ii) she has a “sound understanding”; (iii) she has a distinct conception of the object of her belief; and, finally, (iv) she has formed her belief “without prejudice”. (shrink)

Why 'social' media 'upsets' us. What is in your 'mind' and, why? The 'unified' background is an uber-simple circle.

What is knowledge? I this paper I defend the claim that knowledge is justified true belief by arguing that, contrary to common belief, Gettier cases do not refute it. My defence will be of the anti-luck kind: I will argue that (1) Gettier cases necessarily involve veritic luck, and (2) that a plausible version of reliabilism excludes veritic luck. There is thus a prominent and plausible account of justification according to which Gettier cases do not feature justified beliefs, and therefore, (...) do not present counterexamples to the tripartite analysis. I defend the account of justification against objections, and contrast my defence of the tripartite analysis to similar ones from the literature. I close by considering some implications of this way of thinking about justification and knowledge. (shrink)

This paper contains a critical examination of the prospects for analyses of knowledge that weaken the factivity condition such that knowledge implies approximate truth.

The second half of the twentieth century offers distinct perspectives for the historian of science. The role of the State, the expansion of certain industries and the cultural engagement with science were all transformed. The foregrounding of certain strands of physical science in the public and administrative consciousness – nuclear physics and planetary science, for example – had a complement: the ‘backgrounding’ or institutional neglect of a number of other fields. My work in the history of the physical sciences has (...) focused on this little-noticed intellectual terrain, and could be categorised into several types of case study that share distinct research questions, conceptual understandings and historiographical ramifications. -/- My focus is physical sciences that have been identified as peripheral, if categorised at all, by a previous generation of historians of physics. By this I do not mean peripheral in the geographic sense, but marginal, interstitial or boundary-crossing in the context of occupations, disciplines and professions. The types of case study investigated include (i) scientific instruments; (ii) emergent professions or would-be professions; and, (iii) subject areas falling between academic science, industrial application and State interests. (shrink)

Do you know you are not being massively deceived by an evil demon? That is a familiar skeptical challenge. Less familiar is this question: How do you have a conception of knowledge on which the evil demon constitutes a prima facie challenge? Recently several philosophers have suggested that our responses to skeptical scenarios can be explained in terms of heuristics and biases. We offer an alternative explanation, based in learning theory. We argue that, given the evidence available to the learner, (...) it would be rational for the learner to infer an infallibilist conception of knowledge. (shrink)

An explanatorily powerful approach to the modal dimension of knowledge is Robert Nozick’s idea that knowledge stands in a tracking relation to the world. However, pinning down a specific modal condition has proved elusive. In this paper, I offer a diagnosis and a positive proposal. The root of the problem, I argue, is the unquestioned assumption that tracking is a matter of directly preserving conformity between what is believed and what is the case in certain possible worlds. My proposal is (...) that what we track is whether the conditions for belief formation are appropriate in such worlds. Accordingly, we indirectly track the truth by ensuring that we only use our methods of belief formation in conditions that make it likely that conformity is preserved between what is believed and what is the case. (shrink)

In this paper we argue that knowledge is characteristically safe true belief. We argue that an adequate approach to epistemic luck must not be indexed to methods of belief formation, but rather to explanations for belief. This shift is problematic for several prominent approaches to the theory of knowledge, including virtue reliabilism and proper functionalism (as normally conceived). The view that knowledge is characteristically safe true belief is better able to accommodate the shift in question.

The ambiguity theory of “knows” is the view that knows and its cognates have more than one propositional sense—i.e., more than one sense that can properly be used in “knows that” etc. constructions. The ambiguity theory of “know” has received relatively little attention as an account of the truth-conditions for knowledge ascriptions and denials—especially compared to views like classical, moderate invariantism and epistemic contextualism. In this paper, it is argued that the ambiguity theory of knows has an advantage over both (...) classical, moderate invariantism and epistemic contextualism. This advantage is that it is the only one of these views that can account for “diverging knowledge responses without inconsistency” —i.e., cases in which, for the same subject S and proposition p, one and the same speaker says truly “S knows p” but instead could have truly said “S does not know p” and vice versa. This paper argues both for the existence of DRWI scenarios and the ability of the ambiguity theory of knows to best explain their existence. (shrink)

Traditional philosophical discussions of knowledge have focused on the epistemic status of full beliefs. In this book, Moss argues that in addition to full beliefs, credences can constitute knowledge. For instance, your .4 credence that it is raining outside can constitute knowledge, in just the same way that your full beliefs can. In addition, you can know that it might be raining, and that if it is raining then it is probably cloudy, where this knowledge is not knowledge of propositions, (...) but of probabilistic contents. -/- The notion of probabilistic content introduced in this book plays a central role not only in epistemology, but in the philosophy of mind and language as well. Just as tradition holds that you believe and assert propositions, you can believe and assert probabilistic contents. Accepting that we can believe, assert, and know probabilistic contents has significant consequences for many philosophical debates, including debates about the relationship between full belief and credence, the semantics of epistemic modals and conditionals, the contents of perceptual experience, peer disagreement, pragmatic encroachment, perceptual dogmatism, and transformative experience. In addition, accepting probabilistic knowledge can help us discredit negative evaluations of female speech, explain why merely statistical evidence is insufficient for legal proof, and identify epistemic norms violated by acts of racial profiling. Hence the central theses of this book not only help us better understand the nature of our own mental states, but also help us better understand the nature of our responsibilities to each other. (shrink)

A direct implication of E=K seems to be that false beliefs cannot justify other beliefs, for no false belief can be part of one’s total evidence and one’s total evidence is what inferentially justifies belief. The problem with this alleged implication of E=K, as Comesaña and Kantin :447–454, 2010) have noted, is that it contradicts a claim Gettier cases rely on. The original Gettier cases relied on two principles: that justification is closed under known entailment, and that sometimes one is (...) justified in believing a falsehood. In this paper I argue that E=K, contrary to what Comesaña and Kantin would want us to believe, is compatible with the agent being justified in believing a falsehood. (shrink)

_Tell Me Something I Don’t Know_ is a collection of original dialogues in epistemology, suitable for student readers but also of interest to experts. Familiar problems, theories, and arguments are explored: second-order knowledge, epistemic closure, the preface paradox, skepticism, pragmatic encroachment, the Gettier problem, and more. New ideas on each of these issues are also offered, defended, and critiqued, often in humorous and entertaining ways.

In this article, we present evidence that in four different cultural groups that speak quite different languages there are cases of justified true beliefs that are not judged to be cases of knowledge. We hypothesize that this intuitive judgment, which we call “the Gettier intuition,” may be a reflection of an underlying innate and universal core folk epistemology, and we highlight the philosophical significance of its universality.

In “Facts: Particulars of Information Units?”, Kratzer proposed a causal analysis of knowledge in which knowledge is defined as a form of de re belief of facts. In support of Kratzer’s view, I show that a certain articulation of the de re/de dicto distinction can be used to integrally account for the original pair of Gettier cases. In contrast to Kratzer, however, I think such an account does not fundamentally require a distinction between facts and true propositions. I then discuss (...) whether this account might be generalized and whether it can give us a reductive analysis of knowledge as de re true belief. Like Kratzer, I think it will not, in particular the distinction appears inadequate to account for Ginet-Goldman cases of causally connected but unreliable belief. Nevertheless, I argue that the de re belief analysis allows us to account for a distinction Starmans and Friedman recently introduced between apparent evidence and authentic evidence in their empirical study of Gettier cases, in a way that questions their claim that a causal disconnect is not operative in the contrasts they found. (shrink)

This article discusses the origin of what has become known as the Gettier Problem. It examines the claim put forward, though not expounded or defended, by J.Angelo Corlett in Analyzing Social Knowledge that the basis for Edmund Gettier’s article “Is Justified True Belief Knowledge?” was originally argued for in Plato’sTheaetetus. In his article, Gettier argues that the Justified True Belief condition is not sufficient for knowledge. However, Corlett questions the originality of this argument. This article examines Gettier’s article followed by (...) the Theatetus. After which, the two articles are compared, and the claim is shown to be correct in accusing Gettier of failing consider the full work of the Theaetetus. Socrates also argued that the Justified True Belief condition was not sufficient for knowledge. However, this article concludes by arguing that Socrates went further with his examination than Gettier did. Socrates not only put forward the claim that this condition was insufficient for knowledge, he also tried to supply answers to the problem. (shrink)

This paper highlights an aspect of Gettier situations, one standardly not accorded interpretive significance. A remark of Gettier’s suggests its potential importance. And once that aspect’s contribution is made explicit, an argument unfolds for the conclusion that it is fairly simple to have knowledge within Gettier situations. Indeed, that argument dissolves the traditional Gettier problem.

When it comes to second-order knowledge (i.e. knowing that one knows), internalists typically contend that when we know that p, we can, by reflecting, directly know that we are knowing it. Gettier considerations are employed to challenge this internalistic contention and to make out a prima facie case for internalistic metaepistemological skepticism, the thesis that no one ever intemalistically knows that one internalistically knows that p. In particular, I argue that at the metaepistemological second-order level, the Gettier problem generates three (...) distinct problems which, taken together, seriously undermine the possibility of anyone possessing second-order internalistic knowledge. (shrink)

Neil Sinhababu and I presented Backward Clock, an original counterexample to Robert Nozick’s truth-tracking analysis of propositional knowledge. Fred Adams, John Barker and Murray Clarke argue that Backward Clock is no such counterexample. Their argument fails to nullify Backward Clock which also shows that other tracking analyses, such as Dretske’s and one that Adams et al. may well have in mind, are inadequate.

In a recent very interesting and important challenge to tracking theories of knowledge, Williams & Sinhababu claim to have devised a counter-example to tracking theories of knowledge of a sort that escapes the defense of those theories by Adams & Clarke. In this paper we will explain why this is not true. Tracking theories are not undermined by the example of the backward clock, as interesting as the case is.

Tristan Haze claims we have made two mistakes in replying to his two attempted counter-examples to Tracking Theories of Knowledge. Here we respond to his two recent claims that we have made mistakes in our reply. We deny both of his claims.

Here I defend two counterexamples to Nozick’s truth-tracking theory of knowledge from an attack on them by Adams and Clarke. With respect to the first counterexample, Adams and Clarke make the error of judging that my belief counts as knowledge. More demonstrably, with respect to the second counterexample they make the error of thinking that, on Nozick’s method-relativized theory, the method M in question in any given case must be generally reliable.

Edmund Gettier's 1963 verdict about what knowledge is not has become an item of philosophical orthodoxy, accepted by philosophers as a genuine epistemological result. It assures us that - contrary to what Plato and later philosophers have thought - knowledge is not merely a true belief well supported by epistemic justification. But that orthodoxy has generated the Gettier problem - epistemology's continuing struggle to understand how to accommodate Gettier's apparent result within an improved conception of knowledge. In this book, Stephen (...) Hetherington argues that none of epistemology's standard attempts to solve that problem have succeeded: he shows how subtle yet fundamental mistakes - regarding explication, methodology, properties, modality, and fallibility - have permeated those responses to Gettier's challenge. His fresh and original book outlines a new way of solving the problem, and an improved grasp of Gettier's challenge and its significance is the result. In a sense, Plato can now embrace Gettier. (shrink)

The possibility of justified true belief without knowledge is normally motivated by informally classified examples. This paper shows that it can also be motivated more formally, by a natural class of epistemic models in which both knowledge and justified belief are represented. The models involve a distinction between appearance and reality. Gettier cases arise because the agent's ignorance increases as the gap between appearance and reality widens. The models also exhibit an epistemic asymmetry between good and bad cases that sceptics (...) seem to ignore or deny. (shrink)

When discussing knowledge, two relations are of interest: justified doxastic accessibility \ , she is in \ ) and justification equivalence \ exactly the same justified beliefs that she has in \ ). Speaking of compatibility with the agent’s justified beliefs is potentially ambiguous: either of the two relations \ or \ can be meant. I discuss the possibility of identifying the relation of epistemic accessibility \ , she is in \ ) with the union of \ and \ . (...) Neither Gettier’s examples nor the ‘fake barn’ cases contradict this identification. However, the proposal leads to justification equivalent scenarios being symmetric with respect to knowledge: we cannot know a true proposition in a scenario if it is false in a justification equivalent scenario. This analysis may appear to render non-trivial knowledge impossible. This conclusion follows if the extra premise is granted that for all relevant true propositions there is a justification equivalent scenario in which the proposition is false. I provide a meaning-theoretic argument against this premise. I conclude by pointing out problems that would ensue from giving up the proposed connection between \ , \ and \ and allowing asymmetry of justification equivalent scenarios relative to knowledge. (shrink)