A Moorean fact, in the words of the late David Lewis, is ‘one of those things that we know better than we know the premises of any philosophical argument to the contrary’. Lewis opens his seminal paper ‘Elusive Knowledge’ with the following declaration.

In this paper, I present counterexamples to the evidence thesis, the thesis that S knows that p at t only if S believes that p on the basis of evidence at t. The outline of my paper is as follows. In section 1, I explain the evidence thesis and make clear what a successful counterexample to the evidence thesis will look like. In section 2, I show that instances of non-occurrent knowledge are counterexamples to the evidence thesis. At the end (...) of section 2, I consider the primary thesis of my paper — that the evidence thesis is false — to be successfully defended. In section 3, I consider three variations of the evidence thesis. The first variation restricts the evidence thesis to occurrent knowledge; the second requires for knowledge that one’s belief could be based on evidence; and the third requires for knowledge that the belief was based on evidence at a suitable prior time. The secondary thesis of this paper is that these variations are also subject to serious objections. (shrink)

Liberals claim that some perceptual experiences give us immediate justification for certain perceptual beliefs. Conservatives claim that the justification that perceptual experiences give us for those perceptual beliefs is mediated by our background beliefs. In his recent paper ?Basic Justification and the Moorean Response to the Skeptic?, Nico Silins successfully argues for a non-Moorean version of Liberalism. But Silins's defence of non-Moorean Liberalism leaves us with a puzzle: why is it that a necessary condition for our perceptual experiences to justify (...) us in holding certain perceptual beliefs is that we have some independent justification for disbelieving various sceptical hypotheses? I argue that the best answer to this question involves commitment to Crispin Wright's version of Conservatism. In short, Wright's Conservatism is consistent with Silins's Liberalism, and the latter helps to give us grounds for accepting the former. (shrink)

The Neo-Moorean Deduction (I have a hand, so I am not a brain-in-a-vat) and the Zebra Deduction (the creature is a zebra, so isn’t a cleverly disguised mule) are notorious. Crispin Wright, Martin Davies, Fred Dretske, and Brian McLaughlin, among others, argue that these deductions are instances of transmission failure. That is, they argue that these deductions cannot transmit justification to their conclusions. I contend, however, that the notoriety of these deductions is undeserved. My strategy is to clarify, attack, defend, (...) and apply. I clarify what transmission and transmission failure really are, thereby exposing two questionable but quotidian assumptions. I attack existing views of transmission failure, especially those of Crispin Wright. I defend a permissive view of transmission failure, one which holds that deductions of a certain kind fail to transmit only because of premise circularity. Finally, I apply this account to the Neo-Moorean and Zebra Deductions and show that, given my permissive view, these deductions transmit in an intuitively acceptable way—at least if either a certain type of circularity is benign or a certain view of perceptual justification is false. (shrink)

My focus will be on two questions about Moore’s justification to believe the premises and the conclusion of the argument above. At stake is what makes it possible for our experiences to justify our beliefs, and what makes it possible for us to be justified in disbelieving skeptical..

Since the 1970s Barry Stroud has been one of the most original contributors to the philosophical study of human knowledge. This volume presents the best of Stroud's essays in this area. Throughout, he seeks to clearly identify the question that philosophical theories of knowledge are meant to answer, and the role scepticism plays in making sense of that question. In these seminal essays, he suggests that people pursuing epistemology need to concern themselves with whether philosophical scepticism is true or false. (...) Stroud's discussion of these fundamental questions is essential reading for anyone whose work touches on the subject of human knowledge. (shrink)

Knowledge and its Limits presents a systematic new conception of knowledge as a kind of mental stage sensitive to the knower's environment. It makes a major contribution to the debate between externalist and internalist philosophies of mind, and breaks radically with the epistemological tradition of analyzing knowledge in terms of true belief. The theory casts new light on such philosophical problems as scepticism, evidence, probability and assertion, realism and anti-realism, and the limits of what can be known. The arguments are (...) illustrated by rigorous models based on epistemic logic and probability theory. The result is a new way of doing epistemology and a notable contribution to the philosophy of mind. (shrink)

In the last few years there has been a resurgence of interest in Moore’s Proof of the existence of an external world, which is now often rendered as follows:1 (I) Here’s a hand (II) If there is a hand here, there is an external world Therefore (III) There is an external world The contemporary debate has been mostly triggered by Crispin Wright’s influential—conservative —“Facts and certainty” and further fostered by Jim Pryor’s recent—liberal—“What’s wrong with Moore’s argument?”.2 This debate is worth (...) surveying with care because—so I shall contend—it will help us see that, in fact, it allows for an important view that, so far, hasn’t been explicitly considered. The critical survey will be the task of the next two sections, while, in the remaining.. (shrink)

In this age of post-Moorean modesty, many of us are inclined to doubt that philosophy is in possession of arguments that might genuinely serve to undermine what we ordinarily believe. It may perhaps be conceded that the arguments of the skeptic appear to be utterly compelling; but the Mooreans among us will hold that the very plausibility of our ordinary beliefs is reason enough for supposing that there must be something wrong in the skeptic’s arguments, even if we are unable (...) to say what it is. In so far then, as the pretensions of philosophy to provide a world view rest upon its.. (shrink)

Consider the skeptic about the external world. Let’s straightaway concede to such a skeptic that perception gives us no conclusive or certain knowledge about our surroundings. Our perceptual justification for beliefs about our surroundings is always defeasible—there are always possible improvements in our epistemic state which would no longer support those beliefs. Let’s also concede to the skeptic that it’s metaphysically possible for us to have all the experiences we’re now having while all those experiences are false. Some philosophers dispute (...) this, but I do not. The skeptic I want to consider goes beyond these familiar points to the much more radical conclusion that our perceptual experiences can’t give us any knowledge or even justification for believing that our surroundings are one way rather than another. (shrink)

Contextualism treats ‘knows’ as an indexical that denotes different epistemic properties in different contexts. Contrastivism treats ‘knows’ as denoting a ternary relation with a slot for a contrast proposition. I will argue that contrastivism resolves the main philosophical problems of contextualism, by employing a better linguistic model. Contextualist insights are best understood by contrastivist theory.

The brain-in-a-vat argument for skepticism is best formulated, not using the closure principle, but using the “Preference Principle,” which states that in order to be justified in believing H on the basis of E, one must have grounds for preferring H over each alternative explanation of E. When the argument is formulated this way, Dretske’s and Klein’s responses to it fail. However, the strengthened argument can be refuted using a direct realist account of perception. For the direct realist, refuting the (...) SIV scenario is not a precondition on knowledge of the external world, and only the direct realist can give a non-circular account of how we know we’re not brains in vats. (shrink)

What distinguishes Reidian externalism from other versions of epistemic externalism about justification is its proper functionalism and its commonsensism, both of which are inspired by the 18th century Scottish philosopher Thomas Reid. Its proper functionalism is a particular analysis of justification; its commonsensism is a certain thesis about what we are noninferentially justified in believing.

I defend a sensitive neo-Moorean invariantism, an epistemological account with the following characteristic features: (a) it reserves a place for a sensitivity condition on knowledge, according to which, very roughly, S’s belief that p counts as knowledge only if S wouldn’t believe that p if p were false; (b) it maintains that the standards for knowledge are comparatively low; and (c) it maintains that the standards for knowledge are invariant (i.e., that they vary neither with the linguistic context of the (...) subject of knowledge nor with the linguistic context of the attributor of knowledge). I argue that this sort of account allows us to respond adequately to some difficult puzzles in epistemology, puzzles such as skeptical puzzles, as well as puzzles that inspire epistemological contextualism. I also maintain that by utilizing what Keith DeRose calls a warranted assertibility maneuver, sensitive neo-Moorean invariantism can account for our epistemic judgments in each of these puzzle cases. (shrink)

This book develops and defends a version of direct realism: the thesis that perception gives us direct awareness, and non-inferential knowledge, of the external..

In this paper I lay out, argue for, and defend ethical Mooreanism. In essence, the view says that some moral propositions are Moorean propositions and thus are epistemically superior to the conjunctions of the premises of skeptical arguments to the contrary. In Sect. 1 I explain Mooreanism and then ethical Mooreanism. In Sect. 2 I argue for ethical Mooreanism by noting a number of important epistemic parities that hold between certain moral truths and standard Moorean facts. In Sect. 3 I (...) defend ethical Mooreanism against the objection that moral propositions are too epistemically dissimilar to standard Moorean facts to count as Moorean truths. (shrink)

The two great philosophical figures at the culminating point of the Enlightenment are Thomas Reid in Scotland and Immanuel Kant in Germany. Reid was by far the most influential across Europe and the United States well into the nineteenth century. Since that time his fame and influence have been eclipsed by his German contemporary. This important book by one of today's leading philosophers of knowledge and religion will do much to reestablish the significance of Reid for philosophy today. Nicholas Wolterstorff (...) has produced the first systematic account of Reid's epistemology. Relating Reid's philosophy to present-day epistemological discussions the author demonstrates how they are at once remarkably timely, relevant, and provocative. No other book both uncovers the deep pattern of Reid's thought and relates it to contemporary philosophical debate. This book should be read by historians of philosophy as well as all philosophers concerned with epistemology and the philosophy of mind. (shrink)

In recent years a growing number of philosophers writing about the methodology of philosophy have defended the surprising claim that philosophers do not use intuitions as evidence. In this paper I defend the contrary view that philosophers do use intuitions as evidence. I argue that this thesis is the best explanation of several salient facts about philosophical practice. First, philosophers tend to believe propositions which they find intuitive. Second, philosophers offer error theories for intuitions that conflict with their theories. Finally, (...) philosophers are more confident in rejecting theories to the extent that they have several counter examples involving diverse cases. I argue that these facts are better explained by philosophers' using intuitions as evidence than by any plausible contrary explanations. I further argue that aspects of philosophical practice that my thesis may initially seem ill-suited to explain are in fact unsurprising whether or not my thesis is true. (shrink)

This paper explains the nature and role of common sense in Reid and uses the exposition to answer some of Reid's critics. The key to defending Reid is to distinguish between two kinds of priority that common sense beliefs are supposed to enjoy. Common sense beliefs enjoy epistemological priority in that they constitute a foundation for knowledge; i.e. they have evidential status without being grounded in further evidence themselves. Common sense beliefs enjoy methodological priority in that they constrain philosophical theory: (...) they serve as pre-theoretical commitments that philosophical theories ought to respect in the absence of good reasons for rejecting them. (shrink)

Epistemological disjunctivism in outline -- Favouring versus discriminating epistemic support -- Radical scepticsim.

... and Normative Epistemology The Distinction Between Metaepistemology and Normative Epistemology Although this terminology is relatively new, ...

What modal relation must a fact bear to a belief in order for this belief to constitute knowledge of that fact? Externalists have proposed various answers, including some that combine externalism with contextualism. We shall find that various forms of externalism share a modal conception of “sensitivity” open to serious objections. Fortunately, the undeniable intuitive attractiveness of this conception can be explained through an easily confused but far preferable notion of “safety.” The denouement of our reflections, finally, will be to (...) show how replacing sensitivity with safety makes it possible to defend plain Moorean common sense against the spurious advantages over it claimed by skeptical, tracking, relevant-alternative, and contextualist accounts. (shrink)

Something about this argument sounds funny. As we’ll see, though, it takes some care to identify exactly what Moore has done wrong. Iwill assume that Moore knows premise (2) to be true. One could inquire into how he knows it, and whether that knowledge can be defeated; but Iwon’t. I’ll focus instead on what epistemic relations Moore has to premise (1) and to his conclusion (3). It may matter which epistemic relations we choose to consider. Some philosophers will diagnose Moore’s (...) argument using Contextualist machinery. They’ll say. (shrink)

Moore's 'Proof of an External World' has evoked a variety of responses from philosophers, including bafflement, indignation and sympathetic reconstruction. I argue that Moore should be understood as following Thomas Reid on a variety of points, both epistemological and methodological. Moreover, Moore and Reid are exactly right on all of these points. Hence what I present is a defence of Moore's 'Proof', as well as an interpretation. Finally, I argue that the Reid-Moore position is useful for resolving an issue that (...) has recently received attention in epistemology, namely, how is it that one knows that one is not a brain in a vat? (shrink)

This paper argues that the foundations of our knowledge are the bed-rock certainties of ordinary life, what may be called the Moorean truths. Beyond that are the well-established results within the empirical sciences, and whatever has been proved in the rational sciences of mathematics and logic. Otherwise there is only belief, which may be more or less rational. A moral drawn from this is that dogmatism should be moderated on all sides.

In this 2004 book, Noah Lemos presents a strong defense of the common sense tradition, the view that we may take as data for philosophical inquiry many of the things we ordinarily think we know. He discusses the main features of that tradition as expounded by Thomas Reid, G. E. Moore and Roderick Chisholm. For a long time common sense philosophers have been subject to two main objections: that they fail to give any non-circular argument for the reliability of memory (...) and perception; and that they pick out instances of knowledge without knowing a criterion for knowledge. Lemos defends the appeal to what we ordinarily think we know in both epistemology and ethics and thus rejects the charge that common sense is dogmatic, unphilosophical or question-begging. Written in a clear and engaging style, this book will appeal to students and philosophers in epistemology and ethics. (shrink)

There is a sceptical puzzle according to which knowledge appears to license an unacceptable kind of dogmatism. Here is a version of the corresponding sceptical argument: (1) If a subject S knows a proposition p, then it is OK for S to ignore all evidence against p as misleading; (2) It is never OK for any subject to ignore any evidence against their beliefs as misleading; (3) Hence, nobody knows anything.I distinguish between different versions of the puzzle (mainly a ‘permissibility’ (...) version and a ‘closure’ version) and offer a solution for one version (the permissibility version) of the problem. No matter how much a subject knows, knowledge never gives one a license to ignore evidence against a proposition. Premise (1) of the argument is false and the puzzle can thus be resolved. (shrink)

Open-minded people should endorse dogmatism because of its explanatory power. Dogmatism holds that, in the absence of defeaters, a seeming that P necessarily provides non-inferential justification for P. I show that dogmatism provides an intuitive explanation of four issues concerning non-inferential justification. It is particularly impressive that dogmatism can explain these issues because prominent epistemologists have argued that it can’t address at least two of them. Prominent epistemologists also object that dogmatism is absurdly permissive because it allows a seeming to (...) provide justification even if the seeming was caused in some apparently inappropriate way. I conclude by disarming this objection. (shrink)

Few philosophers believe that G. E. Moore's notorious proof of an external world can give us justification to believe that skepticism about perceptual beliefs is false. The most prominent explanation of what is wrong with Moore's proof—as well as some structurally similar anti-skeptical arguments—centers on conservatism: roughly, the view that someone can acquire a justified belief that p on the basis of E only if he has p-independent justification to believe that all of the skeptical hypotheses that undermine the support (...) lent by E to p are false. In this paper I argue that conservatism does not make trouble for Moore's proof. I do this by setting up a dilemma concerning the notion of "justification to believe" that figures in conservatism. On one understanding of justification to believe, conservatism is subject to obvious counterexamples. On another understanding of justification to believe, conservatism is consistent with Moore's "proof conferring justification upon its conclusion. Since these two understandings exhaust the logical space, the conservative indictment of Mooreanism fails. (shrink)

Virtually all philosophers agree that for a belief to be epistemically justified, it must satisfy certain conditions. Perhaps it must be supported by evidence. Or perhaps it must be reliably formed. Or perhaps there are some other "good-making" features it must have. But does a belief's justification also require some sort of awareness of its good-making features? The answer to this question has been hotly contested in contemporary epistemology, creating a deep divide among its practitioners. Internalists, who tend to focus (...) on scientific or theoretical beliefs as the ideal, insist that such awareness is required for justification. Externalists, who think children's ordinary beliefs in obvious facts are paradigm cases of justified belief, say it isn't required. Michael Bergmann's book offers a decisive refutation of internalism and a sustained defense of externalism. (shrink)

"Dogmatism" is a term renovated by James Pryor [2000] to stand for a certain kind of neo-Moorean response to Scepticism and an associated conception of the architecture of basic perceptual warrant. Pryor runs the response only for (some kinds of) perceptual knowledge but here I will be concerned with its general structure and potential as a possible global anti-sceptical strategy. Something like it is arguably also present in recent writings of Burge 1 and Peacocke.2 If the global strategy could succeed, (...) (...) it would pre-empt any role in the diagnosis and treatment of sceptical paradoxes for the kind of notion of entitlement (rational, non-evidential warrant) I have proposed elsewhere [Wright 2004]. But my overarching contention will be that Dogmatism is, generally and locally, too problematic a stance to be helpful in that project. (shrink)

I defend, in this paper, a version of a philosophy of common sense. I have use of some things from Reid's account of these matters, others from Wittgenstein's. Scepticism looms large—as do the questions of arguments for and examples of common sense. At least two different notions of common sense emerge, one of which has often been overlooked by philosophers.

This book is a defence of the philosophy of common sense in the spirit of Thomas Reid and G.E. Moore, drawing on the work of Aristotle, evolutionary biology and psychology, and historical studies on the origins of early modern philosophy. It defines and explores common sense beliefs, and defends them from challenges from prominent philosophers.