Huw Price

Summary: Contemporary writers often claim that chaos theory explains the thermodynamic arrow of time. This paper argues that such claims are mistaken, on two levels. First, they underestimate the difficulty of extracting asymmetric conclusions from symmetric theories. More important, however, they misunderstand the nature of the puzzle about the temporal asymmetry of thermodynamics, and simply address the wrong issue. Both of these are old mistakes, but mistakes which are poorly recognised, even today. This paper aims to lay bare the mistakes in their classical (pre-chaos theory) manifestations, in order to make it clear that chaos theory cannot possibly do better

In “A Subjectivist’s Guide to Objective Chance,” David Lewis says that he is “led to wonder whether anyone but a subjectivist is in a position to understand objective chance.” The present essay aims to motivate this same Lewisean attitude, and a similar degree of modest subjectivism, with respect to objective causation. The essay begins with Newcomb problems, which turn on an apparent tension between two principles of choice: roughly, a principle sensitive to the causal features of the relevant situation, and a principle sensitive only to evidential factors. Two-boxers give priority to causal beliefs, and one-boxers to evidential beliefs. The essay notes that a similar issue can arise when the modality in question is chance, rather than causation. In this case, the conflict is between decision rules based on credences guided solely by chances, and rules based on credences guided by other sorts of probabilistic evidence. Far from excluding cases of the latter kind, Lewis’s Principal Principle explicitly allows for them, in the form of the caveat that credences should follow beliefs about chances only in the absence of “inadmissible evidence.” The essay then exhibits a tension in Lewis’s views on these two matters, by presenting a class of decision problems—some of them themselves Newcomb problems—in which Lewis’s view of the relevance of inadmissible evidence seems in tension with his causal decision theory. It offers a diagnosis for this dilemma and proposes a remedy, based on an extension of a proposal due to Ned Hall and others from the case of chance to that of causation. The remedy suggests a new view of the relation between causal decision theory and evidential decision theory, namely, that they stand to each other much as chance stands to credence, being objective and subjective faces of the same practical coin. This has much the same metaphysical benefits as Lewis’s own view of chance and also throws interesting new light on Newcomb problems, providing an irenic resolution of the apparent disagreement between causal and evidential decision rules.

For more than a century, physics has known of a puzzling conflict between the T- asymmetry of thermodynamic phenomena and the T-symmetry of the underlying microphysics on which these phenomena depend. This paper provides a guide to the current status of this puzzle, distinguishing the central issue from various issues with which it may be confused. It is shown that there are two competing conceptions of what is needed to resolve the puzzle of the thermodynamic asymmetry, which differ with respect to the number of distinct T-asymmetries they take to be manifest in the physical world. On the preferable one-asymmetry conception, the remaining puzzle concerns the ordered distribution of matter in the early universe. The puzzle of the thermodynamic arrow thus becomes a puzzle for cosmology

Bell’s theorem requires the assumption that hidden variables are independent of future measurement settings. This independence assumption rests on surprisingly shaky ground. In particular, it is puzzlingly time-asymmetric. The paper begins with a summary of the case for considering hidden variable models which, in abandoning this independence assumption, allow a degree of ‘backward causation’. The remainder of the paper clarifies the physical significance of such models, in relation to the issue as to whether quantum mechanics provides a complete description of physical reality

Wittgenstein is often thought to have challenged the view that assertion is an important theoretical category in a philosophical view of language. One of Wittgenstein’s main themes in the early sections of the Investigations is that philosophy misses important distinctions about the uses of language, distinctions hidden from us by ‘the uniform appearances of words.’ (1968, #11) As Wittgenstein goes on to say: It is like looking into the cabin of a locomotive. We see handles all looking more or less alike. (Naturally, since they are all supposed to be handled.) But one is the handle of a crank which can be moved continuously (it regulates the opening of a valve); another is the handle of a switch, which has only two effective positions, it is either off or on; a third is the handle of a brake-lever, the harder one pulls on it, the harder it brakes; a fourth, the handle of a pump: it has an effect only so long as it is moved to and fro. (1968, #12) Few contemporary philosophers share Wittgenstein’s evident familiarity with cabin of a steam locomotive, and in general, most of us are increasingly remote from all but the most superficial understanding of the underlying functions of the tools on which we rely. So we are perhaps even more prone to the mistake that Wittgenstein thinks that philosophy makes with respect to language, that of regarding it as one tool rather than many: ‘Think of the tools in a tool-box: there is a hammer, pliers, a saw, a screw-driver, a rule, a glue-pot, glue, nails and screws.—The functions of words are as diverse as the functions of these objects.’1 (1968, #11)

Newcomb problems turn on a tension between two principles of choice: roughly, a principle sensitive to the causal features of the relevant situation, and a principle sensitive only to evidential factors. Two-boxers give priority to causal beliefs, and one-boxers to evidential beliefs. A similar issue can arise when the modality in question is chance, rather than causation. In this case, the conflict is between decision rules based on credences guided solely by chances, and rules based on credences guided by other sorts of probabilistic evidence. Far from excluding cases of the latter kind, Lewis’s Principal Principle explicitly allows for them, in the form of the caveat that credences should only follow beliefs about chances in the absence of "inadmissible evidence". In this paper I exhibit a tension in Lewis’s views on these two matters. I present a class of decision problems –- actually, I argue, a species of Newcomb problem –- in which Lewis’s view of the relevance of inadmissible evidence seems to recommend one-boxing, while his causal decision theory recommends two-boxing. I propose a diagnosis for this dilemma, and suggest a remedy, based on an extension of a proposal due to Ned Hall and others from the case of chance to that of causation. The remedy dissolves many apparent Newcomb problems, and makes one-boxing non-controversial in those that remain.

This paper suggests a novel reinterpretation of the mathematical core of Wheeler-Feynman absorber theory, and hence a new route to the conclusion that the temporal asymmetry of classical electromagnetic radiation has the same origin as that of thermodynamics. The argument begins (Sec. 2) with a careful analysis of what the apparent asymmetry of radiation actually involves. Two major flaws in the standard version of the Wheeler-Feynman treatment of radiative asymmetry are then identified (Secs. 4–5), and the proposed reinterpretation is described (Sec. 6). This avoids the two flaws previously mentioned, and also the problematic dependence of radiation on cosmological structure

Since the late nineteenth century, physics has been puzzled by the time-asymmetry of thermodynamic phenomena in the light of the apparent T-symmetry of the underlying laws of mechanics. However, a compelling solution to this puzzle has proved elusive. In part, I argue, this can be attributed to a failure to distinguish two conceptions of the problem. According to one, the main focus of our attention is a time-asymmetric lawlike generalisation. According to the other, it is a particular fact about the early universe. This paper aims (i) to distinguish these two different conceptions of the time-asymmetric explanandum in thermodynamics; (ii) to argue in favour of the latter; and (iii) to show that whichever we choose, our rational expectations about the thermodynamic behaviour of the future must depend on what we know about the past: contrary to the common view, statistical arguments alone do not give us good reason to expect that entropy will always continue to increase.

Paul Horwich aims to apply some the lessons of deflationism about truth to the debate about the nature of a theory of meaning. Having pacified the philosophical debate about truth to his satisfaction, he wants to use a bridge between truth and meaning to extend the same peace−making techniques into new territory. His goal is to make the debate about meaning more hospitable for an account based on use, by showing that certain apparent obstacles to such a theory are illusory, given deflationism about truth.

Is non-cognitivism compatible with minimalism about truth? A contemporary argument claims not, and therefore that moral realists, for example, should take heart from the popularity of semantic minimalism. The same is said to apply to cognitivism about other topics—conditionals, for example—for the argument depends only on the fact that ordinary usage applies the notions of truth and falsity to utterances of the kind in question. Given this much, minimalism about truth is said to leave no room for the view that the utterances concerned are non-cognitive in nature

In a famous paper in Noûs in 1979, John Perry points out that action depends on indexical beliefs. In addition to “third-person” information about her environment, an agent need “first-person” information about where, when and who she is. This conclusion is widely interpreted as a reason for thinking that tensed claims cannot be translated without loss into untensed language; but not as a reason for realism about tensed facts. In another famous paper in the same volume of Noûs, Nancy Cartwright argues that action requires that agents represent their world in causal terms, rather than merely probabilistic terms: for, Cartwright argues, there’s a distinction between effective and ineffective strategies, that otherwise goes missing. This is widely taken as a reason for thinking that causal claims cannot be translated without loss into merely probabilistic claims; and also – in contrast to Perry’s case – widely regarded as a reason for realism about causation. In this paper I ask whether the latter conclusion is compulsory, or whether, as in Perry’s case, the need for causal beliefs might merely reflect some “situated” aspect of a decision-maker’s perspective.

In his influential book 'Making Things Happen' and in other places, Jim Woodward has noted some affinities between his own account of causation and that of Menzies and Price, but argued that the latter view is implausibly ‘subjective’. In this piece I discuss Woodward’s criticisms. I argue that the Menzies and Price view is not as different from Woodward’s own account as he believes, and that in so far as it is different, it has some advantages whose importance Woodward misses; but also that the Menzies and Price view lacks some elements whose importance Woodward rightly stresses. When properly characterized, however, the ‘subjectivity’ survives unscathed.

Lecture I begins with a distinction between two themes in philosophical naturalism. The first theme takes science to be our best guide to what there is, the second takes it to be our best guide to the nature of our own thought and talk. Thus the first theme ('object naturalism') motivates a scientifically-constrained metaphysics, while the second ('subject naturalism') motivates a scientifically-constrained philosophy of language and philosophical psychology. The lecture discusses a sense in which these two themes may conflict: in particular, a sense in which subject naturalism may undermine a presupposition of object naturalism. The presupposition in question is the assumption that belief, judgement and assertion are 'referential', or 'representational', in some theoretically robust sense. In showing that this assumption is itself open to naturalistic challenge, the lecture identifies a little-recognised vulnerability in popular forms of (object) naturalism. The remaining lectures aim to show, first, what conception(s) of representation might replace the assumption in question; and second, what the project of philosophical naturalism looks like, in the light of these changes. Lecture II begins with the so-called bifurcation thesis -- the view that speech acts into descriptive and non-descriptive categories. The lecture advocates a different bifurcation, between two notions of representation: an 'external', world-tracking notion, and an 'internal', inferentialist notion. I argue that traditional representationalism confuses these notions. Lecture III outlines a conception of the project of naturalistic philosophy, in the light of this new bifurcation thesis. The recognition that not all representations in the inferential sense need be representation in the world-tracking sense permits a new pluralism within the former class: a pluralism about the functions of representation (in the former sense) in the lives of natural creatures in a natural environment. I emphasise that this kind of pluralism is orthogonal to familiar programs for pluralism in the philosophy of science. It involves a new dimension of variability, that conventional representationalism simply hides from view.