I Introduction

Let's assume there are psychological generalizations that the folk rely upon in explaining and predicting the behavior of their fellows. Let's further assume these generalizations are intentional, in that they do their explanatory and predictive work by attributing to the subjects in their domain intentional mental states such as beliefs, desires, and the like. Then we can define a broad intentional psychology as one that adverts only to broad, viz. purely denotational/ truth-conditional, mental contents in its generalizations; so the sentences expressing its generalizations should be read transparently. A narrow psychology is one that is not so restricted. Accordingly, sentences expressing narrow generalizations will contain opaque contexts, indicated by ‘that’ -clauses ('believes that…,’ ‘desires that … ,’ and the like). Here is an example of the sort of generalization we have in mind:

Hilary Putnam has famously argued that we can know that we are not brains in a vat because the hypothesis that we are is self-refuting. While Putnam's argument has generated interest primarily as a novel response to skepticism, he originally introduced his brain in a vat scenario to help illustrate a point about the ‘mind/world relationship.’ In particular, he intended it to be part of an argument against the coherence of metaphysical realism, and thus to be part of a defense of his conception of truth as idealized rational acceptability. Putnam's discussion has already inspired a substantial body of criticism, but it will be argued here that these criticisms fail to capture the central problem with his argument. Indeed, it will be shown that, rather than simply following from his semantic externalism, Putnam's conclusions about the self-refuting character of the brain in a vat hypothesis are actually out of line with central and plausible aspects of his own account of the relationship between our minds and the world.

By any reasonable reckoning, Gottlob Frege's ‘On Sense and Reference’ is one of the more important philosophical papers of all time. Although Frege briefly discusses the sense-reference distinction in an earlier work (‘Function and Concept,’ in 1891), it is through ‘Sense and Reference’ that most philosophers have become familiar with it. And the distinction so thoroughly permeates contemporary philosophy of language and mind that it is almost impossible to imagine these subjects without it.

The distinction between the sense and the referent of a name is introduced in the second paragraph of ‘Sense and Reference.’

Many philosophers strive for a thin ontology but are nevertheless unwilling to curtail ordinary and scientific talk that carries apparent commitment to the entities they reject. As Carnap put it, such a philosopher speaks with an uneasy conscience, ‘like a man who in his everyday life does with qualms many things which are not in accord with the high moral principles he professes on Sundays.’ To appear less hypocritical he may, of course, tell us openly what he is doing and invite us to join him. But then it is hard to see why he is not advocating the absurd position that we should assent to sentences of the form ‘There are Fs but I don't believe that there are Fs.’

This is a simple objection, and there is a simple answer to it. But the answer is not available to everyone. I will argue that defenders of a particular version of fictionalism are in trouble with Moore's paradox. The bad news for fictionalism in general is that this particular version is the one that best deals with the Quine-Putnam challenge.

Does natural selection explain why individual organisms have the traits that they do? This question has been the subject of vigorous debate in recent philosophy of biology. Sober and Walsh have defended the thesis that natural selection does not explain why any individual organism has the traits that it does. This thesis, I shall call ‘the Negative View.’ Neander and Matthen have defended the contrary thesis, which I shall call ‘the Positive View,’ according to which natural selection at least sometimes does explain why an individual organism has the traits that it does. In this paper, I will argue that recent arguments for the Positive View fail for a reason hitherto unnoticed and I will demonstrate that other recent defenses of the Negative View depend upon my own for their plausibility.

I begin, in Section II, by showing that the issue is whether or not natural selection explains, of an individual, why it has the traits it does.

A skeptic will from time to time make such claims as ‘We know (little or) nothing.’ Call this the skeptical use of the word ‘know.’ In apparent contradiction of the skeptic's claims, almost all of us firmly ascribe knowledge to ourselves and others. We use the word ‘know’ and its cognates frequently and fluently in largely untroubled communication with our fellows. We make judgments ascribing knowledge to ourselves and others. Furthermore, faced with the same situation and needing to make a judgment about whether to ascribe knowledge or not, we agree on the whole with each other's ascriptions (and withholdings and doubtful cases). For the sake of a term, and being careful to neglect any stray connotations it may carry, let us call this the cognitivist use of ‘know.’

On the question of the conclusion of a piece of practical reasoning, few have been willing to follow Aristotle's lead. He said the conclusion was an action. These days, the conclusion is usually described either as a proposition about what one ought to do, or as a psychological state or event, such as a decision to do something, an intention to do something, or a belief about what one ought to do. Why favor these options over the action-as-conclusion view? By far the most oft-repeated answer is that these views, unlike Aristotle's, can accommodate the case in which a conclusion is drawn but not acted upon. The conclusion cannot be an action, it is said, because it is possible to reach a conclusion about what to do without doing the action. My thesis is that this objection fails, and that as a consequence no radical departure from Aristotle's proposal is warranted.

In The Sources of Normativity, Christine Korsgaard affirms that Enlightenment morality is true: humanity is valuable. To many of us few claims seem more obvious. Yet Enlightenment thinkers such as Kant do not limit themselves to affirming that humanity is valuable. They appeal to reason in an effort to establish it. They try to show that, in some sense, we are rationally compelled to recognize the value of humanity. Korsgaard joins in this effort. She champions the claim that unless we take humanity to be valuable, we condemn ourselves to complete practical skepticism, i.e., to the view that we have no reason to do anything at all.

Korsgaard discusses two arguments that, she believes, support this claim. The first she attributes directly to Kant in a series of influential papers on his ethics. The second argument, which she calls a ‘fancy new model’ of the first, she constructs under her own name in The Sources of Normativity. I will defend the view that neither of these arguments succeeds. In doing so, I will not be trying to show that we are mistaken in believing humanity to be valuable.

Throughout the Politics, Aristotle discusses claims to the supreme authority (to kyrion) in a polis. Some claims are made on qualitative grounds, and here Aristotle mentions freedom, wealth, education, good birth, military power, and virtue (1268a21-23, 1279a40-b5, 1283a16-18, 1283bl, 1294a20, 1296b18, 1301a39-1301b4). Other claims are made on quantitative grounds (1296b17), and here Aristotle refers to the superior numbers of the multitude (1296b19). Since he takes all these claims seriously and since several parties may claim power on different grounds, quarrels (amphisbētēsis, 1283b3, also 1283a24) are to be expected. As opposed to this, in the ideal polis all claims are made by the same group. Claims on qualitative grounds make us inquire about possible bearers of such qualities. For example, is a claim on account of wealth, a claim on behalf of wealthy individuals, or may it also be an argument on behalf of groups none of whose members qualifies, but which qualifies as a group if its wealth is taken to be the sum over the individual shares? This question is significant because different answers lead to different distributions of power.

According to Anselm's official definition, freedom of choice is ‘the power to preserve rectitude of will for the sake of that rectitude itself.’ From the point of view of contemporary metaphysics, this is one of the most unhelpful definitions imaginable. Does such freedom require alternative possibilities, for example? Is it compatible with causal determination? Is the exercise of such freedom a necessary and sufficient condition for moral responsibility? The definition sheds no light on these questions.

And so we need to move on from Anselm's definition to Anselm's account of freedom. Here, though, we encounter the opposite problem. Where Anselm's definition seems not to answer these questions at all, Anselm's account seems to answer all these questions, sometimes with a yes and sometimes with a no. Consider the question about alternative possibilities. In De libertate arbitrii, Anselm seems clearly to deny that freedom involves alternative possibilities. God, the good angels, and the blessed dead cannot do otherwise than preserve rectitude, but they are still free- freer, in fact, than those who are capable of abandoning rectitude.

The doctrine of physicalism casts a long shadow in contemporary philosophy, configuring all kinds of philosophical issues and projects. Unsurprisingly, its proponents argue that physicalism has all the obvious features necessary for a scientific hypothesis to be in what we will call ‘good standing,’ i.e. being worthy of serious scientific investigation. In fact, many claim much more, arguing that physicalism is a well-confirmed hypothesis and possibly amongst the best of our theories. But, as our second opening passage makes clear, a persistent worry has been that physicalism, or ‘materialism’ as van Fraassen terms it, is an edifice built on sand. For many philosophers question whether the ‘physical’ can be specified at all, or at least in a manner that will produce a physicalism that would be in good standing.

Pleasure and displeasure have been suffering from intellectual neglect in the philosophy of mind. In contemporary work, the mode of experience which effectively dominates discussion is vision—David Marr's work on visual representation and L. Weiskrantz's work on blindsight are familiar to many philosophers of mind, as are the philosophical uses of such work, and no one seems to tire of working out what the frog's eye tells the frog's brain. Who, though, can name a leading theorist of pain? As a source of examples and intuitions, pain is a perennial favorite in ethics and the philosophy of mind, but in both disciplines pain is taken for granted far more often than it is the object of analysis. Equally significantly, forms of displeasure other than pains are very largely neglected. Pleasure, for its part, has been the nigh-exclusive province of moral theorists; few other than Strawson seem to have taken a special interest in it in the philosophy of mind. The object of the present work is to rectify this neglect, and to give an account of pleasure and displeasure which reveals a striking degree of unity and theoretical tractability underlying the diverse phenomena: a representationalist account.

Anyone who has ever lived with roommates understands the Hobbesian state of nature implicitly. People sharing accommodations quickly discover that buying groceries, doing the dishes, sweeping the floor, and a thousand other household tasks, are all prisoner's dilemmas waiting to happen. For instance, if food is purchased communally, it gives everyone an incentive to overconsume (because the majority of the cost of anything anyone eats is borne by the others). Individuals also have an incentive to buy expensive items that the others are unlikely to want. As a result, everyone's food bill will be higher than it would be if everyone did their own shopping. Things are not much better when it comes to other aspects of household organization. Cleaning is a common sticking point. Once there are a certain number of people living in a house, cleanliness becomes a quasi-public good. If everyone ‘pitched in’ to clean up, then everyone would be happier. But there is a free-rider incentive—before cleaning, it's best to wait around a bit to see if someone else will do it. As a result, the dishes will stack up in the sink, the carpet will get grungy, and so on.

If by the term ‘matter’ is meant the extended, movable, and corporeal stuff out of which perceptible objects are made, then, according to one interpretative tradition, there is nothing in Aristotle's account of the world that corresponds to matter in the above sense of physical stuff. Aristotle does indeed describe certain things as extended, movable, and corporeal: for example, the five elements, earth, water, air, fire, and ether, as well as everything made out of them. He also has the concept of a material cause, that is, the raw materials out of which something can be made or generated, and he makes frequent use of this concept in his analysis of perceptible substances. Still, the fact that Aristotle thought about what perceptible substances are made of is insufficient evidence for attributing to him the concept of matter as physical stuff. In addition, we would want to know whether he thought that all perceptible substances are extended, movable, and corporeal precisely because they are made out of matter, and whether any aspect of their behavior is to be explained simply by virtue of their nature as material objects.

Intuitionism—in some form or another—is the most widely recognized and thoroughly discussed method of justification for moral theories. It rests on the claim that a moral theory must not deviate too much from our pre-theoretical moral convictions (or at least those that we are prepared to hold on reflection). In some form or another, this methodology goes back at least as far as Aristotle, and has been discussed, refined, and defended by such contemporary philosophers as John Rawls and Norman Daniels.

There is, however, another methodology for constructing and defending moral theories. It draws on premises about human nature or the nature of persons to support conclusions about the nature and structure of morality. This method—which I will call the nature to morality methodology—evaluates a moral claim or moral theory on the basis of its relation to some (alleged) facts about the kind of beings we are. For brevity, I will use the term ‘nature-claims’ to refer to claims about human nature or the nature of persons, and the term ‘nature-facts’ to refer to true nature-claims. The nature-claims that have been used to support or criticize various moral theories include claims about human motivation, personal identity, the human soul, and the conceptual features of personhood or rational agency.

Among the more notorious of Cartesian doctrines is the bête machine doctrine — the view that brute animals lack not only reason, but any form of consciousness (having no mind or soul). Recent English commentaries have served to obscure, rather than to clarify, the historical Descartes's views. Standard interpretations have it that insofar as Descartes intends to establish the bête machine doctrine his arguments are palpably flawed. One camp of interpreters thus disputes that he even holds the doctrine. As I shall attempt to show, not only does Descartes affirm the doctrine, his supporting arguments are not palpably flawed — even if they ultimately come up short. It will indeed emerge that, in making his case, Descartes employs interesting argumentative strategies that have not been duly appreciated.

'May one be pardon’ d and retain the offence?’ asks King Claudius in his tormented monologue in Hamlet. Forgiveness appears incompatible with the retention of the offence, both in the sense of enjoying its consequences (Claudius's arrogation of the Queen and the Kingdom of Denmark) and in the sense of the subsistence of the attitude which underlay the offensive act (his cold-heartedness and ambition). There are, however, views which allow for, even admire, an attitude of forgiveness towards people who have ‘retained’ their offense in some way. This idea of forgiveness is harder to justify, since no change (like repentance) has taken place in the agent. We suggest that the concept of toleration can serve as an illuminating clue in such an analysis. The tolerant attitude involves a certain kind of reconciliation with people who not only have done something wrong in the past, but insist on sticking to their objectionable conduct in the present and the future. Tolerance, in other words, is not conditioned by repentance or by commitment to behavioral transformation; it is a kind of unconditional ‘forgiveness’ in advance.