This book is a defense of modal realism; the thesis that our world is but one of a plurality of worlds, and that the individuals that inhabit our world are only a few out of all the inhabitants of all the worlds. Lewis argues that the philosophical utility of modal realism is a good reason for believing that it is true.

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)

Metaphysical modalities are definable from counterfactual conditionals, and the epistemology of the former is a special case of the epistemology of the latter. In particular, the role of conceivability and inconceivability in assessing claims of possibility and impossibility can be explained as a special case of the pervasive role of the imagination in assessing counterfactual conditionals, an account of which is sketched. Thus scepticism about metaphysical modality entails a more far-reaching scepticism about counterfactuals. The account is used to question the (...) significance of the distinction between a priori and a posteriori knowledge. (shrink)

This volume brings together papers by some of the leading figures working on virtue-theoretic accounts in both ethics and epistemology. A collection of cutting edge articles by leading figures in the field of virtue theory including Guy Axtell, Julia Driver, Antony Duff and Miranda Fricker. The first book to combine papers on both virtue ethics and virtue epistemology. Deals with key topics in recent epistemological and ethical debate.

... With those who identify happiness [faring happily or well] with virtue or some one virtue our account is in harmony; for to virtue belongs virtuous activity. But it makes, perhaps, no small difference whether we place the chief good in possession or in use, in state of mind or in activity. For the state of mind may exist without producing any good result, as in a man who is asleep or in some other way quite inactive, but the activity (...) cannot; for one who has the activity will of necessity be acting, and acting well. And as in the Olympic Games it is not the most beautiful and the strongest that are crowned but those who compete, so those who act win, and rightly win, the noble and good things in life. (shrink)

The Realm of Reason develops a new, general theory of what it is for a thinker to be entitled to form a given belief. The theory locates entitlement in the nexus of relations between truth, content, and understanding. Peacocke formulates three principles of rationalism that articulate this conception. The principles imply that all entitlement has a component that is justificationally independent of experience. The resulting position is thus a form of rationalism, generalized to all kinds of content. To show how (...) these principles are realized in specific domains, Peacocke applies the theory in detail to several classical problems of philosophy, including the nature of perceptual entitlement, induction, and the status of moral thought. These discussions involve an elaboration of the structure of entitlement in ways that have applications in many other areas of philosophy. He also relates the theory to classical and recent rationalist thought, and to current issues in the theory of meaning, reference and explanation. In the course of these discussions, he proposes a general theory of the a priori. The focus of the work lies in the intersection of epistemology, metaphysics, and the theory of meaning, and will be of interest both to students and researchers in these areas, and to anyone concerned with the idea of rationality. (shrink)

This exceptional book examines and explains Plato's answer to the normative question, "How ought we to live?" It discusses Plato's conception of the virtues; his views about the connection between the virtues and happiness; and the account of reason, desire, and motivation that underlies his arguments about the virtues. Plato's answer to the epistemological question, "How can we know how we ought to live?" is also discussed. His views on knowledge, belief, and inquiry, and his theory of Forms, are examined, (...) insofar as they are relevant to his ethical view. Terence Irwin traces the development of Plato's moral philosophy, from the Socratic dialogues to its fullest exposition in the Republic. Plato's Ethics discusses Plato's reasons for abandoning or modifying some aspects of Socratic ethics, and for believing that he preserves Socrates' essential insights. A brief and selective discussion of the Statesmen, Philebus, and Laws is included. Replacing Irwin's earlier Plato's Moral Theory (Oxford, 1977), this book gives a clearer and fuller account of the main questions and discusses some recent controversies in the interpretation of Plato's ethics. It does not presuppose any knowledge of Greek or any extensive knowledge of Plato. (shrink)

This paper reviews two skeptical arguments and argues that a reliabilist framework is necessary to avoid them. The paper also argues that agent reliabilism, which makes the knower the seat of reliability, is the most plausible version of reliabilism.

1. What are called ‘intuitions’ in philosophy are just applications of our ordinary capacities for judgement. We think of them as intuitions when a special kind of scepticism about those capacities is salient. 2. Like scepticism about perception, scepticism about judgement pressures us into conceiving our evidence as facts about our internal psychological states: here, facts about our conscious inclinations to make judgements about some topic rather than facts about the topic itself. But the pressure should be resisted, for it (...) rests on bad epistemology: specifically, on an impossible ideal of unproblematically identifiable evidence. 3. Our resistance to scepticism about judgement is not simply epistemic conservativism, for we resist it on behalf of others as well as ourselves. A reason is needed for thinking that beliefs tend to be true. 4. Evolutionary explanations of the tendency assume what they should explain. Explanations that appeal to constraints on the determination of reference are more promising. Davidson’s truth-maximizing principle of charity is examined but rejected. 5. An alternative principle is defended on which the nature of reference is to maximize knowledge rather than truth. It is related to an externalist conception of mind on which knowing is the central mental state. 6. The knowledge-maximizing principle of charity explains why scenarios for scepticism about judgement do not warrant such scepticism, although it does not explain how we know in any particular case. We should face the fact that evidence is always liable to be contested in philosophy, and stop using talk of intuition to disguise this unpleasant truth from ourselves. (shrink)

‘Constitutive luck’ refers to luck that affects the sort of person one is. This article demonstrates that it is a philosophically troubling sort of luck, causing problems in, at least, ethics and political philosophy. Some, notably Susan Hurley, Nicholas Rescher, and Daniel Statman, have argued that such trouble can be avoided, by pointing out that the notion of constitutive luck is incoherent. The article examines this claim by means of a discussion of the idea of luck in general, settling on (...) an account of luck in terms of the notions of chance, value, and (lack of) control. This account is then used to show that the notion of constitutive luck is not incoherent. We are stuck with the problems made by constitutive luck. (shrink)

In his Grundlagen, Frege held that geometrical truths.are synthetic a priori, and that they rest on intuition. From this it has been concluded that he thought, like Kant, that space and time are a priori intuitions and that physical objects are mere appearances. It is plausible that Frege always believed geometrical truths to be synthetic a priori; the virtual disappearance of the word ‘intuition’ from his writings from after 1885 until 1924 suggests, on the other hand, that he became dissatisfied (...) with the notion of intuition as he had employed it in Grundlagen. The belief that a priori intuition is a source of knowledge does not in itself entail idealism: that is a question about what it is that makes true the propositions known in this way. In Grundlagen, Frege expressly states that geometrical truths are objective in the sense of being independent of our intuition. This shows that, even at that period, Frege did not draw the idealist conclusion drawn by Kant. (shrink)

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)

It is claimed that McDowell’s treatment of scepticism offers a potential way of resurrecting the much derided ‘Moorean’ response to scepticism in a fashion that avoids the problems facing classical internalist and externalist construals of neo-Mooreanism. I here evaluate the prospects for a McDowellian neo-Mooreanism and, in doing so, offer further support for the view.

In recent years some moral philosophers and political theorists, who have come to be called “luck egalitarians,” have urged that the essence of social justice is the moral imperative to improve the condition of people who suffer from simple bad luck. Prominent theorists who have attracted the luck egalitarian label include Ronald Dworkin, G. A. Cohen, and John Roemer.1 Larry Temkin should also be included in this group, as should Thomas Nagel at the time that he wrote Equality and Partiality.2 (...) However, each of these theorists asserts a different position. The common ground, if any, is obscure. The idea of luck that is invoked is not transparently clear. Anyway, the term “luck egalitarianism” was coined by a critic of the doctrine, and tendentiously defined to denote an extreme version of the view that looks implausible from the start.3 With some justice Ronald Dworkin, perhaps the chief architect of the luck egalitarian position, has denied that he is a luck egalitarian. (shrink)

There are propositions that upon understanding them it seems that one can “just see” that they are necessary or impossible. A commonly discussed example is the claim that it is not possible for an object to be red and green all over at the same time. My purpose in this paper is to account for how it is that such beliefs are justified. I begin by criticizing a suggestion defended lately by Laurence BonJour and others. BonJour argues that because these (...) beliefs are necessarily true external factors are irrelevant to their epistemic status. This is how BonJour can defend a foundationalist account of the a priori while at the same time attacking foundationalism with respect to empirical knowledge. I argue that this view of the a priori is mistaken. External factors are relevant even in the case of those a priori beliefs it seems we can just see to be true. I defend an alternative account of the justification of such beliefs. I argue that these beliefs may be justified in virtue of their being the products of a basic belief-forming mechanism one has no reason to distrust. In particular, I argue that this approach can be employed to account for the non-inferential justification of a priori beliefs without falling prey to the line of objections BonJour lodges against other forms of foundationalism. (shrink)

In this article I return to an argument that I presented in earlier work to the effect that virtue epistemology is at worse false and at best unmotivated. In the light of recent responses to this argument from such figures as John Greco, Guy Axtell, and Kelly Becker, I here re-state and re-evaluate this argument. In the process the original argument is refined and supplemented in key respects and some of the main charges against it are shown to be unfounded. (...) Nevertheless, I also argue that at least one of the objections to the original argument—due to Becker—may well be on the right lines, and I draw some conclusions in this regard. (shrink)

In a much admired paper Bernard Williams once observed that 'there is not much room for deciding to believe.' This is because beliefs are 'things which we, as it were, find we have', though of course we can decide whether to express them or not. That we cannot decide to believe something on command is not, Williams goes on to say, just a brute empirical fact about our makeup: it is not a mere contingent aspect of our nature, like, for (...) example, our inability to blush just by willing it. The fact that we cannot decide to believe something, just like that, depends, rather, on a feature that is analytically connected to the very concept of belief, namely that beliefs aim at truth. So if I could acquire a belief at will, presumably I could decide to acquire it, as it were, whether it was true or not. 'If, in full consciousness, I could will to acquire a "belief" irrespective of its truth, it is unclear that before the event I could seriously think of it as a belief, i.e., as something purporting to represent reality'. (shrink)