In this paper, I exploit the parallel between epistemic contextualism and metaethical speaker-relativism to argue that a promising way out of two of the primary problems facing contextualism is one already explored in some detail in the ethical case – viz. expressivism. The upshot is an argument for a form of epistemic expressivism modeled on a familiar form of ethical expressivism. This provides a new nondescriptivist option for understanding the meaning of knowledge attributions, which arguably better captures the normative nature (...) of epistemic discourse than descriptivist competitors like invariantism and contextualism. (shrink)

David Lewis (1941-2001) was Class of 1943 University Professor of Philosophy at Princeton University. His contributions spanned philosophical logic, philosophy of language, philosophy of mind, philosophy of science, metaphysics, and epistemology. In On the Plurality of Worlds, he defended his challenging metaphysical position, "modal realism." He was also the author of the books Convention, Counterfactuals, Parts of Classes, and several volumes of collected papers.

I argue that akrasia is not always significantly irrational. To be more precise, I argue that an agent is sometimes more rational for being akratic then she would have been for being enkratic or strong-willed.

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)

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 present chapter attempts to resolve a puzzle about normative testimony. On the one hand, agents act on the advice of others, advice which purports to tell them what they have reason to do. When they do so, they can act for good reason. This thought, though, sits uneasily with another: that the mere fact that someone has advised a course of action is not itself a reason. An interesting view of reasons recently defended by Stephen Kearns and Daniel Star (...) offers a resolution to the puzzle. On this view, reasons are evidence, specifically evidence concerning what one ought to do. If they are correct, then sufficiently good advice is, it turns out, itself a reason, and it is then no puzzle that an agent who acts on such advice is acting for a good reason. The chapter argues that this account of reasons is subject to counterexamples. There are reasons which are not evidence and evidence which is not a reason. This view of reasons cannot therefore hold the key to solving the puzzle of normative testimony. The solution to the puzzle of normative testimony lies instead in a more careful account of what it is to act for a reason. Such an account can preserve both the intuition that advice is not an independent reason and the thought that agents who act on sound advice act for good reason. The account also explains how agents can act for “elusive reasons.” These are facts which are reasons but which would not be if the agent became sufficiently aware of them. (shrink)

Deflationsism about truth is a pot-pourri, variously claiming that truth is redundant, or is constituted by the totality of 'T-sentences', or is a purely logical device (required solely for disquotational purposes or for re-expressing finitarily infinite conjunctions and/or disjunctions). In 1980, Hartry Field proposed what might be called a 'deflationary theory of mathematics', in which it is alleged that all uses of mathematics within science are dispensable. Field's criterion for the dispensability of mathematics turns on a property of theories, called (...) conservativeness. I present some technical results, some of which may be found in Tarski (1936), concerning the logical properties of truth theories; in particular, concerning the conservativeness of adding a truth theory for an object level language to any theory expressed in it. It transpires that various deflationary truth theories behave somewhat differently from the standard Tarskian truth theory. These results suggest that Tarskian theories of truth are not redundant or dispensable. Finally, I hint at an analogy between the behaviour of mathematical theories and of standard (Tarskian) theories of truth with respect to their indispensability to, as Quine would put, our 'scientific world-view'. (shrink)

Russian translation of Gettier E. L. Is Justified True Belief Knowledge? // Analysis, vol. 23, 1963. Translated by Lev Lamberov with kind permission of the author.

Early expressivists, such as A.J. Ayer, argued that normative utterances are not truth-apt, and many found this striking claim implausible. After all, ordinary speakers are perfectly happy to ascribe truth and falsity to normative assertions. It is hard to believe that competent speakers could be so wrong about the meanings of their own language, particularly as these meanings are fixed by the conventions implicit in their own linguistic behavior. Later expressivists therefore tried to arrange a marriage between expressivism and the (...) truth-aptness of normative discourse. Like many arranged marriages, this has not been an entirely happy one. In particular, the marriage has seemed to depend on so-called deflationist theories of truth, and these may well turn out to provide at best a shaky foundation for any marriage. Before advising the parties to file for divorce, though, we should first see whether expressivism itself has not been misunderstood. I argue that the marriage of expressivism to the truth-aptness of normative discourse can indeed be saved, though only in the context of a version of expressivism I call “Ecumenical Expressivism.”. (shrink)