In general, philosophy does not progress as the sciences do. Philosophers seem largely to follow fashions. Of course there are fashions in the sciences, too, but in philosophy they appear to predominate. So, when I look back at the two-thirds or more of the century that I remember, I see a succession of such fashions replacing one another. At the same time, I see something resembling progress in a couple of fields that I was involved in. Finally, I find us, at the close of the twentieth century, still burdened with one long-dominant attitude that many thinkers, in different ways, have tried (in vain) to overcome—an attitude reflected recently, in fact, in a particularly vocal fashion. Let me follow briefly each of these three lines of reflection.

Philosophy in the twentieth century, by and large, has not been interested in comprehensive accounts. This development can be attributed in large part to the breaking of philosophy into schools and the rise of professionalism, both of which have led to the reduction of philosophy as a subject. The task of the philosopher cannot justifiably be so confined. He must attempt to understand all the pivotal realities, what they do, and how they are related. Philosophy is an exploration and adventure. I want to engage in it in order to understand reality, to pay attention to pivotal features, and to the ways in which they are interlocked. Philosophy is a discipline in a constant process of adventurous discovery.

Philosophy differs from most other disciplines in that one of the questions with which its practitioners are professionally concerned is its own nature. There is nothing surprising about this since, having no special subject-matter of its own, it is free—and perhaps obliged—to enquire into the special nature of every discipline. But, such an obligation presumes that we know what in general we are—or should be—up to in philosophy. What is, in fact, our objective? To establish how we should live, the nature of the good life? To determine the scope and limits of human knowledge? To achieve self-understanding? If properly understood, I think the last suggestion is correct. I do not mean that we should turn into psychologists or social scientists. Rather, I mean that our essential, if not our only, business is to get a clear view of our most general working concepts or types of concept and of their place in our lives. We should aim at general human conceptual self-understanding.

In this paper I shall offer an account of the authentic self that is compatible with human intrapsychic, interpersonal, and social experience. I begin by examiningHarry Frankfurt’s influential treatment of authenticity as a form of personal integration, and argue that his conception of the integrated self is too restrictive. I then offer an alternative processual account that views integration as the intelligibility of the self that emerges when a person exercises autonomy skills.

In this paper, I criticize the claim made by Donald Davidson, among others, that Freud’s psychoanalytic theory provides “a conceptual framework within which to describe and understand irrationality.” Further, I defend my epistemological strictures on the explanatory and therapeutic foundations of the psychoanalytic enterprise against the efforts of Davidson, Marcia Cavell, Thomas Nagel, et al., to undermine them.

Taking into account the difficulties that all attempts at a solution of the problem of causal-explanatory exclusion have experienced, we analyze in this paper the chances that mind-body causation is a case of overdetermination, a line of attack that has scarcely been explored. Our conclusion is that claiming that behaviors are causally overdetermined cannot solve the problem of causal-explanatory exclusion. The reason is the problem of massive coincidence, that can only be avoided by establishing a relation between mind and body; that is, by denying overdetermination. The only way to defend that mind-body causation is a case of overdetermination would be by denying any modal force whatever to the principle of the causal closure of the physical, and this is a claim we would not like to reject.

A common conception of what it is for one property to “realize” another suggests that it is the realizer property that does the causal work, and that the realized property is epiphenomenal. The same conception underlies George Bealer’s argument that functionalism leads to the absurd conclusion that what we take to be self-ascriptions of a mental state are really self-ascriptions of “first-order” properties that realize that state. This paper argues for a different concept of realization. A property realizes another if its “forward looking” causal features are a subset of those of the property realized. The instantiation of the realizer property will include the instantiation of the property realized; and when the effects produced are due to the causal features of the latter, it is the instantiation of it that is appropriately regarded as their cause. Epiphenomenalism is avoided, and so is Bealer’s absurd conclusion.

By effective thinkers I mean not people who think effectively, but people who understand “how it’s done,” i.e., people not paralyzed by the philosophical problem of epiphenomenalism. I argue that mental causes are not preempted by either neural or narrow content states, and that extrinsically individuated mental states are not out of proportion with their putative effects. I give three examples/models of how an extrinsic cause might be more proportional to an effect than the competition.

Davidson has argued that the connection between belief and the “constitutive ideal of rationality” precludes the possibility of their being any type-type identities between mental and physical events. However, there are radically different ways to understand both the nature and the content of this “constitutive ideal,” and the plausibility of Davidson’s argument depends on blurring the distinction between two of these ways. Indeed, it will be argued here that no consistent understandingthe constitutive ideal will allow it to play the dialectical role Davidson intends for it.

In this paper, I want to defend the proposal that one has to be a realist about the existence and causal efficacy of reasons if one wants to have rationally justified actions. On this basis, I will propose to understand intentional action in terms of justification alone, not in terms of justification plus causation. I shall argue that an action is intentional, under a certain description, if, and only if, it is justified, under that description, by the agent’s reasons. The proposal recommends itself as being capable of solving the problem of wayward causal chains and is promising as a way of avoiding epiphenomenalism of mental properties.

Perceptual and other consciousness is left out of or is not adequately characterized in naturalist accounts, including eliminative materialism and neural functionalism. We need a radically new start. Phenomenologically, if you are perceptually conscious, then a world—a changing totality of things—must somehow exist. Partly because with consciousness nothing is hidden and all can be reported without inference, perceptual consciousness itself is literally to be understood as things existing spatio-temporally. This account of consciousness as existence does not reduce it to mental worlds and satisfies our conviction of the reality of consciousness—mainly we do not think of it as ethereal or gossamer. The account also explains fundamental subjectivity, as the naturalist accounts cannot, and passes a test having to do with the mind-body problem. It is a near-naturalism. The account can be defended against objections about brains in vats, chairs in minds, and leaving out consciousness.

“Intentionality,” as introduced to modern philosophy by Brentano, denotes the property that distinguishes the mental from all other things. As such, intentionality has been related to purposiveness. I suggest, however, that there are many kinds of purposes that are not mental nor derived from anything mental, such as the purpose of one’s stomach to digest food or the purpose of one’s protective eye blink reflex to keep out the sand. These purposes help us to understand intentionality in a naturalistic way. The naturalist challenge here is to show, first, that natural purposiveness can explain the intentionality of explicitly represented purposes, hence that it is associated with “aboutness” (as in Brentano’s usage). Second, it needs to show how the same kind of analysis can also be used to naturalize intentionality in cases where facts are represented rather than purposes or ends.

There are presently three broad approaches the project of naturalizing intentionality: a purely informational approach (Dretske and Fodor), a purely teleological approach (Millikan and Papineau), and a mixed informationally-based teleological approach (Dretske again). I will argue that the last teleosemantic theory offers the most promising approach. I also think, however, that the most explicit version of a pure teleosemantic theory of content, namely Millikan’s admirable theory, faces a pair of objections. My goal in this paper is to spell out Millikan’s pure teleosemantic theory; then to present two objections; and finally to ask the question whether a teleosemantic framework can be saved from the objections.

When computing is defined as the causal implementation of algorithms and algorithms are defined as effective decision procedures, human thought is mental computation only if it is governed by mental algorithms. An examination of ordinary thinking, however, suggests that most human thought processes are non-algorithmic. Digital machines, moreover, are mark-manipulating or string-processing systems whose marks or strings do not stand for anything for those systems, while minds are semiotic (or “signusing”) systems for which signs stand for other things for those systems. Computing, at best, turns out to be no more than a special kind of thinking.

In this paper I argue for a computational theory of thinking that does not eliminate the mind. In doing so, I will defend computationalism against the arguments of John Searle and James Fetzer, and briefly respond to other common criticisms.

In the ongoing debate, there are a set of mind-body theories sharing a certain physicalist assumption: whenever a genuine cause produces an effect, the causal efficacy of each of the nonphysical properties that participate in that process is determined by the instantiation of a well-defined set of physical properties. These theories would then insist that a nonphysical property could only be causally efficacious insofar as it is physically implemented. However, in what follows we will argue against the idea that fine-grained mental contents could be physically implemented in the way that functional properties are. Therefore, we will examine the metaphysical conditions under which the implementing mechanism of a particular instance of a functional property may be individuated, and see how genuine beliefs and desires—insofar as they track the world—cannot meet such conditions.

I argue here that sophisticated AI systems, with the exception of those aimed at the psychological modeling of human cognition, must be based on general philosophical theories of rationality and, conversely, philosophical theories of rationality should be tested by implementing them in AI systems. So the philosophy and the AI go hand in hand. I compare human and generic rationality within a broad philosophy of AI and conclude by suggesting that ultimately, virtually all familiar philosophical problems will turn out to be at least indirectly relevant to the task of building an autonomous rational agent, and conversely, the AI enterprise has the potential to throw light at least indirectly on most philosophical problems.

The mere possibility of irrationality has been challenged by a long-standing tradition which strongly supports the normative primacy of ideals of rationality. In this paper, I consider the possibility that a coherent account of irrationality can nonetheless be provided and furthermore that some forms of irrationality may be seen as justifiable on the basis of their functional roles.