Edmund Gettier is Professor Emeritus at the University of Massachusetts, Amherst. This short piece, published in 1963, seemed to many decisively to refute an otherwise attractive analysis of knowledge. It stimulated a renewed effort, still ongoing, to clarify exactly what knowledge comprises.

The aim of this paper is to sketch a theory of justified belief. What I have in mind is an explanatory theory, one that explains in a general way why certain beliefs are counted as justified and others as unjustified. Unlike some traditional approaches, I do not try to prescribe standards for justification that differ from, or improve upon, our ordinary standards. I merely try to explicate the ordinary standards, which are, I believe, quite different from those of many classical, (...) e. g., ‘Cartesian’, accounts. (shrink)

This book is the first complete survey and critical appraisal of the large body of research that has appeared during approximately the last decade concerning the analysis of knowing. Robert K. Shope pays special attention to the social aspects of knowing and proposes a new formulation of the fundamental structure of the Gettier problem. Originally published in 1983. The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University (...) Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905. (shrink)

When philosophers try to understand the nature of knowledge, they have to confront the Gettier problem. This problem, set out in Edmund Gettier's famous paper of 1963, has yet to be solved, and has challenged our best attempts to define what knowledge is. This volume offers an organised sequence of accessible and distinctive chapters explaining the history of debate surrounding Gettier's challenge, and where that debate should take us next. The chapters describe and evaluate a wide range of ideas about (...) knowledge that have been sparked by philosophical engagements with the Gettier problem, including such phenomena as fallibility, reasoning, evidence, reliability, truth-tracking, context, luck, intellectual virtue, wisdom, conceptual analysis, intuition, experimental philosophy, and explication. The result is an authoritative survey of fifty-plus years of epistemological research - along with provocative ideas for future research – into the nature of knowledge. (shrink)

Knowledge is a highly valued state in which a person is in cognitive contact with reality. It is, therefore, a relation. On one side of the relation is a conscious subject, and on the other side is a portion of reality to which the knower is directly or indirectly related. While directness is a matter of degree, it is convenient to think of knowledge of things as a direct form of knowledge in comparison to which knowledge about things is indirect. (...) The former has often been called knowledge by acquaintance since the subject is in experiential contact with the portion of reality known, whereas the latter is propositional knowledge since what the subject knows is a true proposition about the world. Knowing Roger is an example of knowledge by acquaintance, while knowing that Roger is a philosopher is an example of propositional knowledge. Knowledge by acquaintance includes not only knowledge of persons and things, but also knowledge of my own mental states. In fact, the knower's own mental states are often thought to be the most directly knowable portion of reality. (shrink)

In this book, Ernest Sosa explains the nature of knowledge through an approach originated by him years ago, known as virtue epistemology. Here he provides the first comprehensive account of his views on epistemic normativity as a form of performance normativity on two levels. On a first level is found the normativity of the apt performance, whose success manifests the performer's competence. On a higher level is found the normativity of the meta-apt performance, which manifests not necessarily first-order skill or (...) competence but rather the reflective good judgment required for proper risk assessment. Sosa develops this bi-level account in multiple ways, by applying it to issues much disputed in recent epistemology: epistemic agency, how knowledge is normatively related to action, the knowledge norm of assertion, and the Meno problem as to how knowledge exceeds merely true belief. A full chapter is devoted to how experience should be understood if it is to figure in the epistemic competence that must be manifest in the truth of any belief apt enough to constitute knowledge. Another takes up the epistemology of testimony from the performance-theoretic perspective. Two other chapters are dedicated to comparisons with ostensibly rival views, such as classical internalist foundationalism, a knowledge-first view, and attributor contextualism. The book concludes with a defense of the epistemic circularity inherent in meta-aptness and thereby in the full aptness of knowing full well. (shrink)

The Description for this book, The Analysis of Knowing: A Decade of Research, will be forthcoming.

Almost every contemporary theory of knowledge is a version of fallibilism, yet an adequate statement of fallibilism has not yet been provided. Standard definitions cannot account for fallibilistic knowledge of necessary truths. I consider and reject several attempts to resolve this difficulty before arguing that a belief is an instance of fallibilistic knowledge when it could have failed to be knowledge. This is a fully general account of fallibilism that applies to knowledge of necessary truths. Moreover, it reveals, not only (...) the connection between fallibility and error, but the connection between fallibility and accidental truth as well. (shrink)

The traditional argument for skepticism relies on a comparison between a normal subject and a subject in a skeptical scenario: because there is no relevant difference between them, neither has knowledge. Externalists respond by arguing that there is in fact a relevant difference—the normal subject is properly situated in her environment. I argue, however, that there is another sort of comparison available—one between a normal subject and a subject with a belief that is accidentally true—that makes possible a new argument (...) for skepticism. Unlike the traditional form of skeptical argument, this new argument applies equally well to both internalist and externalist theories of knowledge. (shrink)

One of the key supposed 'platitudes' of contemporary epistemology is the claim that knowledge excludes luck. One can see the attraction of such a claim, in that knowledge is something that one can take credit for - it is an achievement of sorts - and yet luck undermines genuine achievement. The problem, however, is that luck seems to be an all-pervasive feature of our epistemic enterprises, which tempts us to think that either scepticism is true and that we don't know (...) very much, or else that luck is compatible with knowledge after all. In this book, Duncan Pritchard argues that we do not need to choose between these two austere alternatives, since a closer examination of what is involved in the notion of epistemic luck reveals varieties of luck that are compatible with knowledge possession and varieties that aren't. Moreover, Pritchard shows that a more nuanced understanding of the relationship between luck and knowledge can cast light on many of the most central topics in contemporary epistemology. These topics include: the externalism/internalism distinction; virtue epistemology; the problem of scepticism; metaepistemological scepticism; modal epistemology; and the problem of moral luck. All epistemologists will need to come to terms with Pritchard's original and incisive contribution. (shrink)

Warrant is “that, whatever precisely it is, which makes the difference between knowledge and mere true belief.” S knows that p, therefore, if and only if S’s belief that p is warranted and p is true. This is a purely formal characterization of warrant. Warrant may, no doubt, be a messy item: a substantive analysis might be full of disjuncts and conjuncts and conditionals and caveats. But if there are true beliefs that are not knowledge, then there is something that (...) all beliefs that are knowledge share, and all merely true beliefs lack. This is warrant. I want to argue that warrant, whatever it is that makes the difference between mere true belief and knowledge, entails truth. (shrink)

Warrant is that, whatever it is, which makes the difference between knowledge and mere true belief. In "Warrant Entails Truth" (PPR, December 1995), I argued that it is impossible that a false belief be warranted. Sharon Ryan attacked the argument of that paper in her "Does Warrant Entail Truth?" (PPR, March 1996). In "More on Warrant's Entailing Truth" I present arguments for the claim that warrant entails truth that are, I think, significantly more compelling than the arguments of my original (...) "Warrant Entails Truth." This paper responds to Ryan's objections, but it is not merely a reply to Ryan's article. It is, rather, a free-standing defense of warrant's entailing truth that is the product of discussion and argument for over two years with many philosophers, including Ryan, over the arguments contained in my original paper. (shrink)

Could the standard interpretation of Gettier cases reflect a fundamental confusion? Indeed so. How well can epistemologists argue for the truth of that standard interpretation? Not so well. A methodological mistake is allowing them not to notice how they are simply (and inappropriately) being infallibilists when regarding Gettiered beliefs as failing to be knowledge. There is no Gettier problem that we have not merely created for ourselves by unwittingly being infallibilists about knowledge.

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.

It is common in recent epistemology to distinguish different senses, or conceptions, of epistemic justification. The proposed oppositions include the objective/subjective, internalist/externalist, regulative/nonregulative, resource-relative/resource-independent, personal/verific, and deontological/evaluative conceptions of justification. In some of these cases, writers regard both members of the contrasting pair as legitimate; in other cases only one member. In this paper I want to propose another contrasting pair of conceptions of justification, and hold that both are defensible and legitimate. The contrast will then be used to construct (...) a modified version of reliabilism, one which handles certain problem cases more naturally than my previous versions of reliabilism. (shrink)

Against the traditional view, Alvin Goldman argues that logic, probability theory, and linguistic analysis cannot by themselves delineate principles of rationality or justified belief. The mind's operations must be taken into account.

Introduction -- Fallibilism -- Contextualism -- Knowledge and reasons -- Justification -- Belief -- The value and importance of knowledge -- Infallibilism or pragmatic encroachment? -- Appendix I: Conflicts with bayesian decision theory? -- Appendix II: Does KJ entail infallibilism?

Blind Realism originated in the deeply felt conviction that the widespread acceptance of Gettier-type counterexamples to the classical definition of knowledge rests in a demonstrably erroneous understanding of the nature of human knowledge. In seeking to defend that conviction, Robert F. Almeder offers a fairly detailed and systematic picture of the nature and limits of human factual knowledge.

Blind Realism originated in the deeply felt conviction that the widespread acceptance of Gettier-type counterexamples to the classical definition of knowledge rests in a demonstrably erroneous understanding of the nature of human knowledge. In seeking to defend that conviction, Robert F. Almeder offers a fairly detailed and systematic picture of the nature and limits of human factual knowledge.

Nozick analyzes fundamental issues, such as the identity of the self, knowledge and skepticism, free will, the foundations of ethics, and the meaning of life.

Some key aspects of contemporary epistemology deserve to be challenged, and _How to Know_ does just that. This book argues that several long-standing presumptions at the heart of the standard analytic conception of knowledge are false, and defends an alternative, a practicalist conception of knowledge. Presents a philosophically original conception of knowledge, at odds with some central tenets of analytic epistemology Offers a dissolution of epistemology’s infamous Gettier problem — explaining why the supposed problem was never really a problem in (...) the first place. Defends an unorthodox conception of the relationship between knowledge-that and knowledge-how, understanding knowledge-that as a _kind_ of knowledge-how. (shrink)

Almost all theories of knowledge and justified belief employ moral concepts and forms of argument borrowed from moral theories, but none of them pay attention to the current renaissance in virtue ethics. This remarkable book is the first attempt to establish a theory of knowledge based on the model of virtue theory in ethics. The book develops the concept of an intellectual virtue, and then shows how the concept can be used to give an account of the major concepts in (...) epistemology, including the concept of knowledge. This highly original work of philosophy for professionals will also provide students with an excellent introduction to epistemology, virtue theory, and the relationship between ethics and epistemology. (shrink)

Ernest Sosa argues for two levels of knowledge, the animal and the reflective, each viewed as a distinctive human accomplishment.

Plantinga examines the nature of epistemic warrant; whatever it is that when added to true belief yields knowledge. This volume surveys current contributions to the debate and paves the way for his owm positive proposal in Warrant and Proper Function.

Fallibilism is the epistemological thesis that no belief (theory, view, thesis, and so on) can ever be rationally supported or justified in a conclusive way. Always, there remains a possible doubt as to the truth of the belief. Fallibilism applies that assessment even to science’s best-entrenched claims and to people’s best-loved commonsense views. Some epistemologists have taken fallibilism to imply skepticism, according to which none of those claims or views are ever well justified or knowledge. In fact, though, it is (...) fallibilist epistemologists (which is to say, the majority of epistemologists) who tend not to be skeptics about the existence of knowledge or justified belief. Generally, those epistemologists see themselves as thinking about knowledge and justification in a comparatively realistic way — by recognizing the fallibilist realities of human cognitive capacities, even while accommodating those fallibilities within a theory that allows perpetually fallible people to have knowledge and justified beliefs. Still, although that is the aim of most epistemologists, the question arises of whether it is a coherent aim. Are they pursuing a coherent way of thinking about knowledge and justification? Much current philosophical debate is centered upon that question. Epistemologists generally seek to understand knowledge and justification in a way that permits fallibilism to be describing a benign truth about how we can gain knowledge and justified beliefs. One way of encapsulating that project is by asking whether it is possible for a person ever to have fallible knowledge and justification. (shrink)

Warrant is that, whatever it is, which makes the difference between knowledge and mere true belief. In “Warrant Entails Truth” (PPR, December 1995), I argued that it is impossible that a false belief be warranted. Sharon Ryan attacked the argument of that paper in her “Does Warrant Entail Truth?” (PPR, March 1996). In “More on Warrant’s Entailing Truth” I present arguments for the claim that warrant entails truth that are, I think, significantly more compelling than the arguments of my original (...) “Warrant Entails Truth.” This paper responds to Ryan’s objections, but it is not merely a reply to Ryan’s article. It is, rather, a free-standing defense of warrant’s entailing truth that is the product of discussion and argument for over two years with many philosophers, including Ryan, over the arguments contained in my original paper. (shrink)

Warrant is “that, whatever precisely it is, which makes the difference between knowledge and mere true belief.” S knows that p, therefore, if and only if S’s belief that p is warranted and p is true. This is a purely formal characterization of warrant. Warrant may, no doubt, be a messy item: a substantive analysis might be full of disjuncts and conjuncts and conditionals and caveats. But if there are true beliefs that are not knowledge, then there is something that (...) all beliefs that are knowledge share, and all merely true beliefs lack. This is warrant. I want to argue that warrant, whatever it is that makes the difference between mere true belief and knowledge, entails truth. (shrink)

This paper provides a principled and elegant solution to the Gettier problem. The key move is to draw a general metaphysical distinction and conscript it for epistemological purposes. Section 1 introduces the Gettier problem. Sections 2–5 discuss instructively wrong or incomplete previous proposals. Section 6 presents my solution and explains its virtues. Section 7 answers the most common objection.