Ruth Weintraub

An impossibility result pertaining to the aggregation of individual judgements is thought by many to have significant implications for political theory, social epistemology and metaphysics. When members of a group hold a rational set of judgments on some interconnected questions, the theorem shows, it isn't always (logically) possible for them to aggregate their judgements into a collective one in conformity with seemingly very plausible constraints. I reject one of the constraints which engender the dilemma. The analogy with the lottery paradox, I argue, shows that rational belief needn't be consistent. So the alleged implications of the dilemma are dispelled

In the section of the Treatise titled ‘Of the immateriality of the soul’, Hume adduces an argument to show that nothing can be ‘locally conjoined’ with all of a person’s perceptions. The argument is seldom discussed, and deserves attention, mainly because it can be transformed into an argument against the very existence of a soul. In this paper, I present and closely examine both arguments, Hume’s argument and the one against the existence of the soul. Both, I conclude, are fallacious. In dem Abschnitt des Treatise mit dem Titel ‚Of the immateriality of the soul‘ bringt Hume ein Argument vor, das zeigen soll, dass nichts mit allen Perzeptionen einer Person ‚lokal verknüpft‘ sein kann. Das Argument wird selten diskutiert, verdient aber Aufmerksamkeit, hauptsächlich deshalb, weil es in ein Argument gegen die Existenz der Seele umgewandelt werden kann. In diesem Aufsatz stelle ich beide Argumente – Humes Argument und das gegen die Existenz der Seele – dar und untersuche sie im Detail. Ich gelange zu der Feststellung, dass beide Argumente fehlerhaft sind.

It is possible that a fair coin tossed infinitely many times will always land heads. So the probability of such a sequence of outcomes should, intuitively, be positive, albeit miniscule: 0 probability ought to be reserved for impossible events. And, furthermore, since the tosses are independent and the probability of heads (and tails) on a single toss is half, all sequences are equiprobable. But Williamson has adduced an argument that purports to show that our intuitions notwithstanding, the probability of an infinite sequence is 0. In this paper, I rebut his argument.No Abstract

Two kinds of considerations are thought to be relevant to the correct response to the discovery of a peer who disagrees with you about some question. The first is general principles pertaining to disagreement. According to the second kind of consideration, a theory about the correct response to peer disagreement must conform to our intuitions about test cases. In this paper, I argue against the assumption that imperfect conformity to our intuitions about test cases must count against a theory about peer disagreement, offer a principled way of shrugging off a theory’s failure to deliver the intuitive verdict, and consider the main extant theories from the new methodological perspective.

RésuméSi on la définit comme une action contraire au bon jugement de l'agent, l'action acrasique se trouve exclue par le principe selon lequel une personne a forcément l'intention de faire ce qu'elle juge devoir faire. Une fois ce principe rejeté, comme je le propose ici, le problème traditionnel de l'acrasie, qui est celui de sa possibilité même, s'évanouit. Je soutiens, cependant, qu'un problème plus limité semble se poser si nous admettons que les actions acrasiques doivent s'expliquer par des raisons, et je requiers que les explications en de tels cas soient de type naturaliste. Je montre que la difficulté se trouve résolue par une compréhension adéquate de la nature des explications naturalistes.

summaryAccording to the radical sceptic we have no reason to believe anything, being unable even to distinguish the more probable from the less. I propose to consider the practical problems engendered by this stance. It seems to require that we suspend judgement, but it is not clear that we can acquiesce to this demand. Is it psychologically possible to suspend belief? And if it is, can the sceptic live and act without believing? The practical difficulties, I shall argue, are genuine , but do not absolve us from the need to contend with sceptical arguments

It seems obvious that our beliefs are logically imperfect in two ways: they are neither deductively closed nor logically consistent. But this common-sense truism has been judged erroneous by some philosophers in the light of various arguments. In defence of common sense I consider and rebut interpretative arguments for logical perfection and show that the assumption espoused by common sense is theoretically superior, and capable - unlike its rival - of accounting for the informativeness of mathematics. Finally, I suggest that common sense opens the way to genuine disputes about the correct logic.

Comparisons between utilities pose a pressing problem if, while incapable of being grounded, they are required in ethical deliberation. My aim is to consider whether there are epistemological impediments to implementing such ethical choices. Can we find ourselves being persuaded of the ethical need to compare utilities of different individuals, yet unable to do so because the comparisons cannot be warranted? I argue that the problem cannot arise; no plausible moral principle will invoke magnitudes which are inscrutable.

William James’ declared intention is to oppose Clifford’s claim that it “is wrong always, everywhere, and for every one, to believe anything upon insufficient evidence”. But I argue that he is confused about his doxastic prescriptions. He isn’t primarily concerned, as he thinks he is, with the legitimacy of belief in the absence of sufficient evidence. The most important contribution of his essay is a suggestion - a highly insightful and contentious one - as to what it is to believe in accordance with the evidence.

The lottery paradox shows seemingly plausible principles of rational acceptance to be incompatible. It has been argued that we shouldn’t be concerned by this clash, since the concept of (categorical) belief is otiose, to be supplanted by a quantitative notion of partial belief, in terms of which the paradox cannot even be formulated. I reject this eliminativist view of belief, arguing that the ordinary concept of (categorical) belief has a useful function which the quantitative notion does not serve. I then propose a solution to the paradox it engenders.

  There are arguments which purport to rebut psychological determinism by appealing to its alleged incompatibility with rationality. I argue that they all fail. Against Davidson, I argue that rationality does not preclude the existence of psychological laws. Against Popper, I argue that rationality is compatible with the possibility of predicting human actions. Against Schlesinger, I claim that Newcomb's problem cannot be invoked to show that human actions are unpredictable. Having vindicated the possibility of a rationally-based theory of action, I consider the form it might take

In this paper, I consider some ways in which the Copy Principle and Hume’s nominalism impinge on one another, concluding that the marriage is not a happy one. I argue for the following claims. First, Hume’s argument against indeterminate ideas isn’t cogent even if the Copy Principle is accepted. But this does not vindicate Locke: the imagistic conception of ideas, presupposed by the Copy Principle, will force Locke to accept something like Hume’s view of the way general terms function, the availability of abstract ideas notwithstanding. Second, Hume’s discussion of nominalism provides support for the “old Hume” interpretation, which takes the Copy Principle to be a criterion of meaningfulness, as against the “new Hume” reading, according to which it constrains what we can know. Finally, nominalism forces Hume to adopt a more complicated theory of ideas.

According to conciliatory views about peer disagreement, both peers must accord their disagreeing peer some weight, and move towards him. Non‐conciliatory views allow one peer, the one who responded correctly to the evidence, to remain steadfast. In this paper, I consider the suggestion that it may be rational for both disagreeing peers to hold steadfastly to their opinion. To this end, I contend with arguments adduced against the permissiveness the supposition involves, and identify some ways in which different responses for different agents to the evidence might be reasonable.

I consider a seemingly attractive strategy for grappling with the mind-body problem. It is often thought that materialists are committed to spatially locating mental events, whereas dualists are barred from so doing. The thought naturally arises, then, that reasons for or against the spatiality of the mental may be wielded to adjudicate between the different positions in the mind-body dispute. Showing that mental events are spatially located, it may be thought, is ipso facto showing the truth of materialism. Conversely, it seems, if we can show that mental events are not spatially located, we will have refuted materialism. The strategy looks promising because it reduces a very abstruse problem to a much more tractable one. Unfortunately, I will argue, it can’t be implemented.

Descartes’ circle has been extensively discussed, and I do not wish to add another paper to that literature. Rather, I use the circle to facilitate our understanding of two types of scepticism and the proper attitude to them. Descartes’ text is especially apt for this purpose, because a case can be made for attributing to him both types. Although I will touch on the interpretative question, that is not my main aim. My contention is that one brand - whether or not it is the one that Descartes favoured - should be taken very seriously, and Descartes’ failure to respond to it non circularly cannot be met with equanimity.

According to the received view, Hume is a much more rigorous and consistent concept-empiricist than Locke. Hume is supposed to have taken as a starting point Locke's meaning-empiricism, and worked out its full radical implications. Locke, by way of contrast, cowered from drawing his theory's strange consequences. The received view about Locke's and Hume's concept-empiricism is mistaken, I shall argue. Hume may be more uncompromising (although he too falters), but he is not more rigorous than Locke. It is not because of (intellectual) timidity that Locke does not draw Hume's conclusions from his empiricism. It is, rather, because of his much sounder method.

Hume is sometimes thought to provide a ‘naturalistic’ response to the sceptic. I consider two ways in which this response may be construed. According to the first, the fact that we are psychologically determined to hold a belief provides it with justification. According to the second, ‘natural’ beliefs provide limits within which reason can legitimately be employed, limits which the sceptic transgresses when he attempts to defend his position. Both versions of the naturalistic response to scepticism, I will argue, aren't plausible. And they aren't, at least not predominantly, Hume's.