Ralph Wedgwood

This chapter is concerned with the distinction that most contemporary epistemologists express by distinguishing between “propositional” and “doxastic” justification. The goal is to develop an account of this distinction that applies, not just to full or outright beliefs, but also to partial credences—and indeed, in principle, to attitudes of all kinds. The standard way of explaining this distinction, in terms of the “basing relation”, is criticized, and an alternative account—the “virtue manifestation” account—is proposed in its place. This account has a certain kinship with the epistemological approach that is known as “reliabilism”, but it also has certain key differences—above all, it is compatible with an internalist view of rationality.

Often, when one faces a choice between alternative actions, there are reasons both for and against each alternative. On one way of understanding these words, what one “ought to do all things considered (ATC)” is determined by the totality of these reasons. So, these reasons can somehow be “combined” or “aggregated” to yield an ATC verdict on these alternatives. First, various assumptions about this sort of aggregation of reasons are articulated. Then it is shown that these assumptions allow for the proof of a “Reasons Aggregation Theorem” – parallel to John Harsanyi’s 1955 “Social Aggregation Theorem”. All reasons for action are grounded in reason-providing values; and, for every such reason-providing value, there is in principle a way of measuring how strongly this value counts against each alternative. The theorem tells us that the appropriate measure of how much reason ATC there is against each alternative is simply a weighted sum of the strengths with which these values count against that alternative; the agent ought not ATC to perform an action iff there is ATC more reason against it than against some available alternative.

Many philosophers think that internalism supports a noncognitivist account of normative judgments, according to which these judgments do not count as genuine beliefs, but rather as non-cognitive states of some kind. Such noncognitivist accounts of normative judgments naturally accompany an expressivist account of the meaning of normative statements. This chapter considers the prospects of such an expressivist theory, taking as its paradigm the most recent theory of Allan Gibbard. It is argued that this theory is vulnerable to a strengthened form of the objection that P. T. Geach derived from the work of Frege. This makes it plausible that expressivist accounts face insuperable problems, and so that both expressivism and non-cognitivism should be rejected.

Philosophers have long distinguished between practical and theoretical rationality. The first section of this chapter begins by discussing the ways in which this distinction was drawn by Aristotle and Kant; then it sketches what seems to be the general consensus today about how, at least roughly, the distinction should be drawn. The rest of this chapter explores what practical and theoretical rationality have in common: in the second section, several parallels between practical and theoretical rationality are outlined, and it is argued that these parallels make it plausible that a unifying account of rationality can be given. Finally, in the third section, a number of such unifying accounts of practical and theoretical rationality are surveyed. These include accounts that are inspired in various ways by Hume and by the results of formal decision theory, as well as views that appeal to reasons and to the distinctive value of correct or appropriate attitudes.

This essay explores the following position: Ultimate moral principles are a priori truths; hence, it is irrational to assign a non-zero credence to any proposition that is incompatible with these ultimate moral principles ; and this sort of irrationality, if it could have been avoided, is in a sense inexcusable. So—at least if moral relativism is false—in any disagreement about ultimate moral principles, at least one party to the disagreement is inexcusably irrational. This position may seem extreme, but it is argued that it is more plausible than it first appears.

What is normativity? It is argued here that normativity is best understood as a property of certain concepts: normative thoughts are those involving these normative concepts; normative statements are statements that express normative thoughts; and normative facts are the facts (if such there be) that make such normative thoughts true. Many philosophers propose that there is a single basic normative concept—perhaps the concept of a reason for an action or attitude—in terms of which all other normative concepts can be defined. It is argued here that this proposal faces grave difficulties. According to a better proposal, what these normative concepts have in common is that they have a distinctive sort of conceptual role—a reasoning-guiding conceptual role. This proposal is illustrated by a number of examples: different normative concepts differ from each other in virtue of their having different conceptual roles of this reasoning-guiding kind.

An account of Plato’s theory of knowledge is offered. Plato is in a sense a contextualist: at least, he recognizes that his own use of the word for “knowledge” varies – in some contexts, it stands for the fullest possible level of understanding of a truth, while in other contexts, it is broader and includes less complete levels of understanding as well. But for Plato, all knowledge, properly speaking, is a priori knowledge of necessary truths – based on recollection of aspects of the Forms – and so in contemporary terms, it meets the conditions of “safety” and “adherence” (or “indefeasibility”) to the highest degree. This account is defended on the basis of the text of Meno, Phaedo, and the Republic, against some objections – especially objections that are due to Gail Fine.

According to a widely held view of the matter, whenever we assess beliefs as ‘rational’ or ‘justified’, we are making normative judgements about those beliefs. In this discussion, I shall simply assume, for the sake of argument, that this view is correct. My goal here is to explore a particular approach to understanding the basic principles that explain which of these normative judgements are true. Specifically, this approach is based on the assumption that all such normative principles are grounded in facts about values, and the normative principles that apply to beliefs in particular are grounded in facts about alethic value––a kind of value that is exemplified by believing what is true and not believing what is false. In this chapter, I shall explain what I regard as the best way of interpreting this approach. In doing so, I shall also show how this interpretation can solve some problems that have recently been raised for approaches of this kind by Selim Berker, Jennifer Carr, Michael Caie, and Hilary Greaves.

There are three well-known models of how to account for perceptual belief within a probabilistic framework: (a) a Cartesian model; (b) a model advocated by Timothy Williamson; and (c) a model advocated by Richard Jeffrey. Each of these models faces a problem—in effect, the problem of accounting for the defeasibility of perceptual justification and perceptual knowledge. It is argued here that the best way of responding to this the best way of responding to this problem effectively vindicates the Cartesian model. Finally, it is argued that, given the best interpretation of the probabilistic framework, that the Cartesian model is not vulnerable to the main criticisms that have been raised against it.

As a young Anglican clergyman, Joseph Butler published the first edition of his Fifteen Sermons Preached at the Rolls Chapel in 1721; a revised edition appeared in 1729. Almost immediately, it was widely understood that these sermons present a strikingly subtle and careful form of a relatively traditional conception of ethics, in contrast to the more radical views of other philosophers such as Thomas Hobbes. Only a few years later, David Hume was much concerned to assimilate Butler's insights, while himself arguing for more radical views; and those who sought to respond to Hume, such as Richard Price and Thomas Reid, drew deeply on Butler's thought.Such early utilitarians as Jeremy Bentham and J. S....

This essay examines the epistemology of evaluative, and especially moral, thinking, and attempts an analysis of value-concepts. It proposes an account according to which sentiment plays a central role in all rational evaluative thinking. But this account diverges sharply from traditional emotivism: it insists that rational evaluative thinking must be principled; it defends the pursuit of systematic moral theory through seeking reflective equilibrium; and, though committed to holding that value-judgments can be straightforwardly true, it is compatible with many metaphysical positions about the nature of evaluative truth, ranging from subjectivism to non-reductive realism about values. ;First, a general conception of epistemology and conceptual analysis is articulated. A philosophical study of a concept should offer a non-circular account of what it is to grasp the concept; and grasp of a concept involves mastery of the basic rules for forming rational beliefs involving the concept. ;Value-concepts, it is proposed, are essentially practical. This implies internalism: value-judgments are essentially connected to an actual or imagined motivation to act accordingly. To avoid circularity, such an internalist account must assign an evidential role in evaluative thinking to emotions or sentiments. ;As guides to evaluative truth, sentiments are highly fallible. But one can counteract this fallibility only by constructing a set of general principles, through seeking reflective equilibrium on the basis of one's sentiments, and thereby simultaneously refining both one's sentiments and one's value-judgments. ;According to this account, rational evaluative thinking is principled reliance on sentiment A discussion of the emotions shows that this account of value-concepts is not circular; and it is indicated how the metaphysical questions, about what it is for value-judgments to be true, could be resolved. ;Moral judgments differ from other value-judgments in demanding, not just theoretical agreement about what is true, but practical agreement about what is to be done; and moral sentiments stem from a capacity to respond emotionally to facts about people's interests regardless of how exactly one is related to those interests oneself. Finally, various sceptical challenges to our moral capacities are considered

Here is a definition of knowledge: for you to know a proposition p is for you to have an outright belief in p that is correct precisely because it manifests the virtue of rationality. This definition resembles Ernest Sosa’s “virtue theory”, except that on this definition, the only virtue that must be manifested in all instances of knowledge is rationality, and no reductive account of rationality is attempted—rationality is assumed to be an irreducibly normative notion. This definition is compatible with “internalism” about rationality, and with a form of “pragmatic encroachment” on the conditions of rational outright belief. An interpretation is given of this definition, and especially of the sense of ’because’ that it involves. On this interpretation, this definition entails that both safety and adherence are necessary conditions on knowledge; it supports a kind of contextualism about terms like ‘knowledge’; and it provides resources to defend safety, adherence, and contextualism, against some recent objections.

Suppose that it is rational to choose or intend a course of action if and only if the course of action maximizes some sort of expectation of some sort of value. What sort of value should this definition appeal to? According to an influential neo-Humean view, the answer is “Utility”, where utility is defined as a measure of subjective preference. According to a rival neo-Aristotelian view, the answer is “Choiceworthiness”, where choiceworthiness is an irreducibly normative notion of a course of action that is good in a certain way. The neo-Humean view requires preferences to be measurable by means of a utility function. Various interpretations of what exactly a “preference” is are explored, to see if there is any interpretation that supports the claim that a rational agent’s “preferences” must satisfy the “axioms” that are necessary for them to be measurable in this way. It is argued that the only interpretation that supports the idea that the rational agent’s preferences must meet these axioms interprets “preferences” as a kind of value-judgment. But this turns out to be version of the neo-Aristotelian view, rather than the neo-Humean view. Rational intentions maximize expected choiceworthiness, not expected utility.

Both these ideas are intuitively plausible: rationality has an external aim, such as forming a true belief or good decision; and the rationality of a belief or decision is determined purely by facts about the thinker’s internal mental states. Unlike earlier conceptions, the conception of rationality presented here explains why these ideas are both true. Rational beliefs and decisions, it is argued, are those that are formed through the thinker’s following ‘rules of rationality’. Some rules count as rules of rationality because it is rational to believe---through following other rules---that those rules are reliable. But there must also be certain basic rules, which are a priori, or ‘built into’ our basic cognitive capacities. That these rules are a priori is a purely internal matter; and in following these rules the thinker has done all that could reasonably be expected to achieve the external aim of forming a true belief or good decision.

This paper explores the problems that are raised by a certain traditional sceptical paradox. The conclusion will be that the most challenging problem raised by this paradox does not primarily concern the justification of beliefs; it concerns the justification of belief-forming practices. This conclusion is supported by showing that if we can solve the sceptical problem for belief-forming practices, then it will be a relatively straightforward matter to solve the problem that concerns the justification of beliefs.

Many philosophres have attempted to argue from the "Humean Theory of Motivation" (HTM) and the "Internalism Requirement" (IR) to the "Humean Theory of Practical Reason" (HTPR). This argument is familiar, but it has rarely been stated with sufficient precision. In this paper, I shall give a precise statement of this argument. I shall then rely on this statement to show two things. First, the HTPR is false: it is incompatible with some extremely plausible assumptions about weakness of will or akrasia. Second, this argument for the HTPR is invalid: even if the HTM and the IR are true, they do not provide any support whatsoever to the HTPR.

Non-reductive moral realism is the view that there are moral properties which cannot be reduced to natural properties. If moral properties exist, it is plausible that they strongly supervene on non-moral properties- more specifically, on mental, social, and biological properties. There may also be good reasons for thinking that moral properties are irreducible. However, strong supervenience and irreducibility seem incompatible. Strong supervenience entails that there is an enormous number of modal truths (specifically, truths about exactly which non-moral properties necessitate which moral properties); and all these modal truths must be explained. If these modal truths can all be explained, then it must be a fundamental truth about the essence of each moral property that the moral property is necessarily equivalent to some property that can be specified purely in mental, social and biological terms; and this fundamental truth appears to be a reduction of the moral property in question. The best way to resist this argument is by resorting to the claim that mental and social properties are not, strictly speaking, natural properties, but are instead properties that can only be analysed in partly normative terms. Acceptance of that claim is the price of non-reductive moral realism.

In this book, Christopher Peacocke proposes a general theory about what it is for a thinker to be entitled to form a given belief. This theory is distinctively rationalist: that is, it gives a large role to the a priori, while insisting that the propositions or contents that can be known a priori are not in any way “true in virtue of meaning” (and without in any other way denigrating these propositions as “trivial”, or as propositions that “tell us nothing about the world”, or the like). Peacocke then applies this theory to several classical problems in epistemology — to the problem of how our sensory experiences can entitle us to form beliefs about the external world, to the problem of induction, and to the problem of what entitles us to form moral beliefs.

This paper outlines a new approach to the task of giving an account of the meaning of moral statements: a sort of "conceptual role semantics", according to which the meaning of moral terms is given by their role in practical reasoning. This role is sufficient both to distinguish the meaning of any moral term from that of other terms, and to determine the property or relation (if any) that the term stands for. The paper ends by suggesting reasons for regarding this "conceptual role semantics" approach as preferable to noncognitivism, the causal theory of reference, and noncircular conceptual analysis.

The fundamental principle of practical reasoning (if there is such a thing) must be a rule which we ought to follow in all our practical reasoning, and which cannot lead to irrational decisions. It must be a rule that it is possible for us to follow directly - that is, without having to follow any other rule of practical reasoning in order to do so. And it must be a basic principle, in the sense that the explanation of why we rationally ought to follow this rule lies purely in the structure of our rational capacities themselves (and not, for example, in empirical evidence that we merely happen to have). This fundamental principle, it is argued, requires that you decide to do something only if the basis of your decision is such that (i) it is rational for you to believe that you have given the matter enough thought, and (ii) your actual deliberation does not warrant the conclusion that the chosen option is definitely worse than some other option that you have considered. A decision formed through reasoning is rational if and only if the agent followed this rule in making the decision. The claim that this is the fundamental principle of practical reasoning conflicts with Hobbesian approaches because it implies that practical reasoning aims not only at satisfying desires, but at forming beliefs about which options are better than others. It conflicts with Kantian approaches because it implies that to think of something as a good thing to do is not just to think of it as a rational thing to choose. This account also shows how to solve some famous controversies surrounding practical reason: the key is to understand how the rationality of concluding that one option is better than another is affected by our desires, our estimates of probabilities, and our moral judgments.

A concept that can be expressed by the term ‘rationality’ plays a central role in both epistemology and ethics -- and especially in formal epistemology and decision theory. It is argued here that when the term is used in this way, the concept of “rationality” is the concept of a kind of virtue, with all the central features that are ascribed to the virtues by Plato and Aristotle, among others. Interpreting rationality as a kind of virtue helps to solve several problems, such as the relations between “rationality” and “rational requirements” and between “propositional” and “doxastic justification”, and to answer objections to the thesis that “rationality” is a normative concept that are based on the principle that ‘ought’ implies ‘can’.