Ralph Wedgwood

Is there any distinctive aspect of rationality that deserves the label of “instrumental rationality”? Recently, Joseph Raz (2005) has argued that instrumental rationality is a “myth”. In this essay, I shall give some qualified support to Raz’s position: as I shall argue, many philosophers have indeed been seduced by certain myths about instrumental rationality. Nonetheless, Raz’s conclusion is too strong. Instrumental rationality is not itself a myth: there really is a distinctive aspect of rationality that deserves the label of “instrumental rationality”. In the first two sections of this essay, I shall start by giving a rough intuitive description of the phenomenon that seems to me the best candidate for the label “instrumental rationality”. As we shall see, this rough description gives us reason to reject some of the myths that surround instrumental rationality. Then in the rest of this essay, I shall try to give a more precise general specification of this phenomenon. In Sections 3 and 4, I shall consider what has been said about instrumental rationality by several other philosophers. Identifying what is missing in these other philosophers’ accounts will help me to develop my own positive specification, which I shall present in Sections 5 and 6.

If beliefs are subject to a basic norm of correctness—roughly, to the principle that a belief is correct only if the proposition believed is true—how can this norm guide believers in forming their beliefs? Answer: this norm guides believers indirectly: believers are directly guided by requirements of rationality—which are themselves explained by this norm of correctness. The fundamental connection between rationality and correctness is probabilistic. Incorrectness comes in degrees; for beliefs, these degrees of incorrectness are measured by quadratic scoring rules, such as the so-called Brier score. This account is defended against objections; and its implications for suspension of judgement are explored

According to John Broome, akrasia consists in a failure to intend to do something that one believes one ought to do, and such akrasia is necessarily irrational. In fact, however, failing to intend something that one believes one ought to do is only guaranteed to be irrational if one is certain of a maximally detailed proposition about what one ought to do; if one is uncertain about any part of the full story about what one ought to do, it could be perfectly rational not to intend to do something that one believes one ought to do. This paper seeks to remedy this problem, by proposing an anti-akrasia principle that covers cases of uncertainty (as well as cases of such complete certainty). It is argued that this principle is in effect the fundamental principle of practical rationality.

According to the anti-Humean theory of motivation, it is possible to be motivated to act by reason alone. According to the Humean theory of motivation, this is impossible. The debate between these two theories remains as vigorous as ever (see for example Pettit 1987, Lewis 1988, Price 1989 and Smith 1994). In this paper I shall argue that the anti-Humean theory of motivation is incompatible with a number of prominent recent theories of content. I shall focus on causal or informational theories of content (such as Dretske 1981, Fodor 1990 and Stalnaker 1984), and on verificationist theories of content (such as Dummett 1993, Putnam 1983 and Wright 1986), though in fact I believe that the same argument applies to several other theories of content as well.

This essay offers an account of the truth conditions of sentences involving deontic modals like ‘ought’, designed to capture the difference between objective and subjective kinds of ‘ought’ This account resembles the classical semantics for deontic logic: according to this account, these truths conditions involve a function from the world of evaluation to a domain of worlds (equivalent to a so-called “modal base”), and an ordering of the worlds in such domains; this ordering of the worlds itself arises from two further elements – a probability function and a value function – since this ordering ranks the worlds in accordance with the expected value of certain propositions that are true at those worlds. Thus, a proposition of the form ‘Ought (p)’ is true at a world of evaluation w if and only if p is true at all the top-ranked worlds in the domain assigned to w. This domain of worlds consists of metaphysically possible worlds, while the probability function is defined over a space of epistemically possible worlds (which may include metaphysically impossible worlds, such as worlds where Hesperus is not Phosphorus). Evidence is given that this account assigns the correct truth conditions to a wide range of sentences involving ‘ought’. Since these truth conditions involve both a domain of metaphysically possible worlds and a space of epistemically possible worlds, there are two corresponding kinds of conditional involving ‘ought’, depending on which space of worlds is restricted by the conditional. Finally, some objections that might be raised against this account are answered.

According to normative judgment internalism (NJI), normative judgments -- that is, judgments of the form 'I ought to F' and the like -- are "essentially practical", in the sense that they are in some way essentially connected to practical reasoning, or to motivation for action. Many metaethicists believe that if NJI is true, then it would cast grave doubts on any robustly realist (RR) conception of normative judgments. These metaethicists are mistaken. This mistake about the relations between NJI and RR seems to be due to hasty and undefended assumptions about the nature of belief. Any philosophical conception of belief that has the resources to deal with Frege's Puzzle (how to explain the apparent failures of referential transparency in belief ascriptions) will also have the resources to reconcile NJI and RR with respect to normative judgments.

This article proposes a new theory of rational decision, distinct from both causal decision theory (CDT) and evidential decision theory (EDT). First, some intuitive counterexamples to CDT and EDT are presented. Then the motivation for the new theory is given: the correct theory of rational decision will resemble CDT in that it will not be sensitive to any comparisons of absolute levels of value across different states of nature, but only to comparisons of the differences in value between the available options within states of nature; however, the correct theory will also resemble EDT in that it will rely on conditional probabilities (not unconditional probabilities). The new theory gives a prominent role to the notion of a “benchmark” for each state of nature, by comparison with which the value of the available options in that state of nature are measured, and so it has been called the Benchmark Theory (BT). It is argued that BT gives the right verdict on the cases that seem to be counterexamples to CDT and EDT. Finally, some objections to BT are considered and answered.

Many philosophers have thought that colours or flavours or values are in some way less objective than shape or mass or motion. This paper explores the approach to capturing this thought that is based on the idea of ‘ response-dependence ’. First, it is argued that the conceptions of response-dependence developed by Mark Johnston, Philip Pettit and Crispin Wright fail to capture this thought adequately. Then, the rest of the paper proposes an alternative conception, based in part on Kit Fine's notion of " essence ", which looks more likely to succeed in capturing the thought adequately

Intuitively, it seems that some belief-forming practices have the following three properties: 1. They are rational practices, and the beliefs that we form by means of these practices are themselves rational or justified beliefs. 2. Even if in most cases these practices reliably lead to correct beliefs (i.e., beliefs in true propositions), they are not infallible: it is possible for beliefs that are formed by means of these practices to be incorrect (i.e., to be beliefs in false propositions). 3. The rationality of these practices is basic or primitive. That is, the rationality of these practices is not due simply to the availability, by means of some process of reasoning that relies purely on other practices, of a rational or justified belief in the reliability of these practices. How can there be such practices? This paper offers an answer to that question.

What exactly is reasoning? Like many other philosophers, I shall endorse a broadly causal conception of reasoning. Reasoning is a causal process, in which one mental event (say, one’s accepting the conclusion of a certain argument) is caused by an antecedent mental event (say, one’s considering the premises of the argument). Just like causal accounts of action and causal accounts of perception, causal accounts of reasoning have to confront a version of what has come to be known as the problem of deviant causal chains. In this paper, I shall propose an account of the nature of reasoning, incorporating a solution to the specific version of the deviant causal chains problem that arises for accounts of reasoning. One striking feature of my solution is that it requires that certain normative facts are causally efficacious. It might be thought that this feature will make my account incompatible with any plausibly naturalistic approach to understanding the mind. I shall argue that this is not so: my account of the nature of reasoning is quite compatible with plausible versions of naturalism.