One of my fellow graduate students at MIT had access to the Pentagon Papers at a time when they were still classified, and he was writing a dissertation on aspects of the American involvement in Vietnam. One morning over breakfast he discovered that he had been preempted by the New York Times. Every scholar recently working on the Soviet Union, China, and Eastern Europe must understand that student’s sensation that morning. By now, they must face newspapers with a mixture of hope and foreboding. Events outrun the most radical predictions. Not only has the Wall crumbled, with pieces of it being sold as souvenirs, but Albania has established telephone connections to the world not long after westerners came to believe Albania had been the only nation in modem times to succeed in disappearing.

Whether we’re reading H.G. Wells, Robert Heinlein, Ray Bradbury, or Kurt Vonnegut, time travel is a wonderful narrative trick, freeing a story from the normal ‘one damn thing after another’ progression of time. But many philosophers claim it can never be more than that because backwards causation in general, and time travel in particular, are logically impossible.

In this paper I examine one type of argument commonly given for this disappointing conclusion: the time travel paradoxes. Happily for science fiction fans, these arguments fall far short of showing what they are intended to show. Why they fail can be better understood in the light of an analogy between these arguments and some arguments libertarians offer against determinism.

We can generate a puzzle concerning identity by combining two plausible assumptions and one strong temptation. I shall consider these in order.

The first assumption is often ignored, at least by implication, but it is something which seems obviously to be the case, namely, that we human beings are animals—comparatively complex animals by the standards that hold for our planet, perhaps, but animals nonetheless. For such animals the conditions for individuation are no more complex than they are for any other animal, or, at least, for any other mammal. There are problems, of a sort, for Siamese twins, real or conceptual, and there may be individuation problems of one kind or another kind for various animals, including humans, during the reproductive cycle, as well as classification problems concerning what John Locke wanted to teach us all not to consider monsters. Still, by and large, the question is a simple one. Animals are born and they die, and, in general, there is not too much theoretical puzzlement over their world lines. Between any given birth and its corresponding death there is precisely one such line. Thus, I shall take our animality for granted. I do not know if the puzzle I pose would still arise on other accounts or not. As there are no coherent alternative accounts around, the question is a fairly academic one.

I offer Jimmy a dollar to wiggle his ears. He wiggles them because he wants the dollar and, as a result of my offer, thinks he will earn it by wiggling his ears. So I cause him to believe something that explains, or helps to explain, why he wiggles his ears. If I push a button, and a bell, wired to the button, rings because the button is depressed, I cause the bell to ring. I make it ring. Indeed, I ring it. So why don’t I, by offering him a dollar, make Jimmy wiggle his ears? Why, indeed, don’t I wiggle them? If I ring a bell by pushing a button, why don’t I wiggle Jimmy’s ears by offering him a dollar?

That is a question that has always vexed a compatibilist’s vision of human freedom. If an intentional act–say, wiggling one’s ears in order to earn a dollar–is caused by one’s beliefs and desires (the reasons one has for wiggling one’s ears), then, by the transitivity of the causal relation, it appears to follow that it is (also) caused by whatever causes one to have those beliefs and desires. But the causes of belief and desire are often (in fact, if we trace the causal chain far enough backward, always) factors over which one has no control. So intentional behavior is often (or always) something one is made (caused) to do by factors over which one has no control. This, however, robs intentional behaviorand, presumably, also voluntary action–of its autonomy. Deliberate acts–Jimmy wiggling his ears to earn a dollar–have the same causal structure as does a bell that rings because a button is pushed. The only difference is the switch.

‘There is no such thing as a language,’ Donald Davidson tells us (‘A Nice Derangement of Epitaphs,’ in Ernest LePore, ed., Truth and Interpretation [Oxford: Basil Blackwell 1986] 433-46, 446). Though this is a startling claim in its own right, it seems especially puzzling coming from a leading theorizer about language. Over the years, Davidson’s important essays have sparked the hope that there is a route to a positive, nonskeptical theory of meaning for natural languages. This hope would seem to be dashed if there are no natural languages. Unless Davidson’s radical claim is a departure from his developed views, the Davidsonian program appears to have undermined itself.

In a recent book, Donald Davidson’s Philosophy of Language: An Introduction (which Davidson has enthusiastically endorsed), Bjorn Ramberg promises to establish that Davidson's startling claim is not an aberration. Rather, it 'emerges as a natural development of his theory of meaning' (2). He reads the claim that there is no such thing as a language as the claim that the concept of a language has no useful theoretical role. Like the concepts of meaning and reference, it is a 'ghost of reification' which Davidson attempts to 'exorcise' from our philosophical thinking about linguistic communication. All three concepts can be seen as mere ladders to be kicked away once the edifice of a Davidsonian theory of linguistic communication is properly erected on the sole foundation of the concept of truth. The result, he assures us, ‘is not a theory which undercuts itself, but a comprehensive, coherent account of the phenomenon of linguistic communication’ (3).

Contemporary arguments for scientific realism are typically based on some form of inference to the best explanation. Sometimes such arguments concern the methods of science: given the success of scientific methodology, realism offers the best explanation of this success. Sometimes such arguments concern the content of scientific theories: given observed regularities in nature, explanations must be given of those regularities; the best such explanations will be realist. One forceful explanationist argument about the content of science can be based on Hans Reichenbach’s Principle of the Common Cause (CC). Roughly, CC says that whenever an enduring correlation between two events is observed, there must be some preceding event which is the common cause of the two, and is the explanation for the correlation. Rigid adherence to this demand for a common cause, however, supposedly goes beyond the instrumentalist explanatory resources available to the antirealist, and hence CC is taken to be a sufficient condition for realism. Further, one might claim that any argument that realism has greater explanatory power than antirealism depends either explicitly or implicitly on CC, and hence CC is also a necessary condition for realism.

The aim of this paper is to show how thought experiments help us learn about laws. After providing examples of this kind of nomic illumination in the first section, I canvass explanations of our modal knowledge and opt for an evolutionary account. The basic application is that the laws of nature have led us to develop rough and ready intuitions of physical possibility which are then exploited by thought experimenters to reveal some of the very laws responsible for those intuitions. The good news is that natural selection ensures a degree of reliability for the intuitions. The bad news is that the evolutionary account seems to limit the range of reliable thought experiment to highly practical and concrete contexts. In the fifth section, I provide reasons for thinking that we are not as slavishly limited as a pessimistic construal of natural selection suggests. Nevertheless, I promote the idea that biology is a promising source of predictions and diagnoses of thought experiment failures.

People intend to do things, try to do things, and do things. Do they also will to do things? More precisely, if people will to do things and their willing bears upon what they do, is willing, or volition, something distinct from intending and trying? This question is central to the intention/volition debate, a debate about the ingredients of the best theory of the nature and explanation of human action. A variety of competing conceptions of volition, intention, and trying have been advanced in the literature; it would be impossible to examine each thoroughly in a single paper. We can show, however, that the major functional roles ascribed to volition are nicely filled by a triad composed of intention, trying, and information feedback. Sections I and II below develop an account of the connection between intention and trying. Section III examines leading arguments for the existence of volitions and decomposes volitions into members of the triad just identified.

Hume’s account of how the self enters the moral domain and comes to a consciousness of itself as a moral being is one which he superimposes upon his Treatise account of the constitution of the non-metaphysical self. This primordial self is for Hume constructed out of the passions of pride and humility which are themselves in tum constructed out of certain feelings of pain and pleasure, these feelings being worked on by memory and imagination, and converted back and forth into series of ideas and impressions. In presenting this account of the way in which we achieve a coherent self-awareness and self-knowledge such that we ‘know our own force’ (T 597), Hurne in fact employs a radical psychology which he must discard once the moral self comes into view. The use Hume makes of this psychology has gone unnoticed in the literature, but once we understand its implications we will be able to dispel the confusion that some have found in his story.

The focus here will be on democracy as a social good. Today people want to live in a democratic society. But why do they see this as a good? Exploring this question will lead us to a justification of democracy. I shall not be concerned primarily with justifying full or ideal democracy; for it is important to show the positive effects of even modest democratic gains. I do not think one can justify democracy in the more demanding sense of showing it has consequences that any rational being would desire. So I shall be content to give what might seem merely a social, or group-based, rather than a purely rational justification of democracy.

In 1968, Nelson Goodman published his Languages of Art which became one of the most important works on aesthetics in the tradition of analytical philosophy. Goodman offered there a semiotic theory of art, the purpose of which was to explicate our concept of art in terms of different symbolic or referential functions; the theory was further developed in his subsequent book Ways of Worldmaking. Though it is a very subtle and sophisticated theory, I will argue that it is not adequate, that it doesn't even satisfy Goodman's own requirements for a theory of art. Traditionally, the aim of a theory of art has been to capture the essence of art, to describe what is common to all works of art and at the same time distinguishes them from everything else. As a nominalist, Goodman does not, however, believe that there is any essence of art that we can discover.

Can there be a first-order, philosophical or psychological theory that explains all the facts of surface perception? By ‘first-order’ I mean a theory about the constituents of what J.J. Gibson called ‘the ecological environment’; and by ‘surface perception,’ I mean the perception of the surfaces of any of those ecological constituents that have surfaces. The question about surfaces is important for two reasons. First, as we shall see, they are complex features and, as such, provide a difficult test case for any theory of perception. And, of course, if no theory can handle the case of surface perception it will follow by existential generalization that no first order theory of perception is possible. Second, surfaces play a key, virtually unique, role in human perception. Some account of that role is thus necessary; but if no first order theory is possible, that account will have to be something other than a theory. Since I shall be arguing that no first order theory is possible, I shall propose an alternative way of approaching the topic of surface perception. That surfaces play such an important role in the human perception of the ambient environment has been recognized by many writers.

John Martin Fischer has recently proposed that actions and omissions are asymmetric with respect to the requirement of alternative possibilities for moral responsibility: whereas moral responsibility for an action does not require freedom to refrain from performing the action, moral responsibility for failure to perform an action does require freedom to perform the action. In what follows, I first critically assess Fischer's asymmetry principle. In arguing against the principle, I raise some concerns about Fischer's association of responsibility with control. I then motivate a riddle regarding omissions: some cases appear to show that a person is not responsible for failing to bring about something in virtue of the fact that the person could not bring about that thing. Other cases, though, seemingly show that a person is responsible for failing to bring about something even though the person could not bring about that thing. What explains the asymmetry in responsibility attributions in these cases involving omissions? Third, I consider some answers to this riddle and explain why they are inadequate. Finally, I sketch my own answer.

This is a sketch of an ethical system designed to please those who ask for no more than mild constraints on the principle of utility. The system does not grant absolute rights, or the sort of constraints which enshrine absolute respect for persons, freedom, equality, or autonomy. Instead, it speaks to those consequentialist moralists for whom the need for such constraints arises only when their absence is capable of producing monstrous results: those which are not merely unfair, but which involve great misery, so that the few suffer horribly for slight benefit to the many. (Such moralists are unconcerned, for example, about great inequalities among very rich and happy people.) So far, no modification of the principle of utility itself has dealt successfully with all such cases, partly because it seems arbitrary to pick some point past which people's utility should not be lowered for small benefit to others.

It is widely thought among philosophers that Joseph Butler’s criticism of psychological egoism in his Sermons is, in the words of A.E. Duncan-Jones, ‘the classic refutation of it.’ Indeed, no less a philosopher than David Hume restated and put forth Butler’s central argument against hedonistic egoism — without due credit — as part of his own critique. Yet recent commentators have begun to question Butler’s arguments, albeit usually with sympathy and in the hope of saving what they take to be his insights. I propose to focus on Butler’s main objection to hedonistic psychological egoism, to show how and why it fails to refute plausible forms of the thesis, and briefly to indicate why philosophical attempts to disprove this theory of motivation are misguided. I will assume a basic familiarity with Butler’s psychological theory and ethics, and I must refrain from discussing important related topics, e.g., the ‘friendliness’ of self-love to conscience, benevolence, and particular affections.

Philosophers’ intuitions about what constitutes autonomy are largely driven by the exemplars or paradigms that we recognize. There are indefinitely many exemplars, inasmuch as there are relatively private personae that serve as autonomy exemplars such as our parents, third grade teacher, or, for the megalomaniac, oneself. But among Western philosophers there are doubtless some exemplars that are widely shared and broadly influential. Philosophical exemplars include Socrates, Aristotle’s magnanimous man, Kant’s noumenal self that is perfectly attuned to the moral law, Mill’s anti-authoritarian non-conformist, Marx’s manin-society (after the higher form of communism is achieved), Nietzsche’s Zarathustra, and Sartre’s authentic youth who must decide whether to join the French resistance or stay at home for the sake of his mother. Exemplars from outside of philosophy include Antigone, Christ, Faust, Ibsen’s Enemy of the People, Winston Churchill, and even figures from popular culture such as the baseball player Ted Williams, the free spirited flower children of the 1960s, and practically any character that John Wayne ever played.

… if we bear well in mind the scope of our senses and what it is exactly that reaches our faculty of thinking by way of them, we must admit that in no case are the ideas of things presented to us by the senses just as we form them in our thinking. So much so that there is nothing in our ideas which is not innate to the mind or the faculty of thinking, with the sole exception of those circumstances which relate to experience, such as the fact that we judge that this or that idea which we now have immediately before our mind refers to a certain thing situated outside us. We make such a judgment not because these things transmit the ideas to our mind through the sense organs, but because they transmit something which, at exactly that moment, gives the mind occasion to form these ideas by means of the faculty innate to it. Nothing reaches our mind from external objects through the sense organs except certain corporeal motions… in accordance with my own principles. But neither the motions themselves nor the figures arising from them are conceived by us exactly as they occur in the sense organs, as I have explained at length in my Optics. Hence it follows that the very ideas of the motions themselves and of the figures are innate in us. The ideas of pains, colors, sounds and the like must be all the more innate if, on the occasion of certain corporeal motions, our mind is to be capable of representing them to itself, for there is no similarity between these ideas and the corporeal motions.

In the Groundwork of the Metaphysic of Morals, Kant claims that hypothetical imperatives are analytic and that categorical imperatives are synthetic. This claim plays a crucial role in Kant’s attempt to establish moral ‘oughts’ as categorically binding on all rational agents, for by classifying moral statements according to this distinction, Kant hopes to uncover the sort of justification required to establish such statements. However, Kant’s application of the analytic/ synthetic distinction to imperatives is problematic. For one thing, this distinction was developed by Kant in connection with indicative, subject-predicate statements, which would seem to cast doubt on the idea that imperatives can be either analytic or synthetic. Moreover, Kant’s claim that hypothetical imperatives are analytic and categorical imperatives are synthetic seems to conflict with other claims in his moral works. For example, in the Groundwork, Kant claims that hypothetical imperatives are (compared to categorical imperatives) unproblematic since they can be established on the basis of experience (G, 419-20, 49-50). But this is incompatible with the idea that hypothetical imperatives are analytic, since presumably all analytic statements are a priori — established independently of experience.