A computational theory of induction must be able to identify the projectible predicates, that is to distinguish between which predicates can be used in inductive inferences and which cannot. The problems of projectibility are introduced by reviewing some of the stumbling blocks for the theory of induction that was developed by the logical empiricists. My diagnosis of these problems is that the traditional theory of induction, which started from a given (observational) language in relation to which all inductive rules are formulated, does not go deep enough in representing the kind of information used in inductive inferences.

As an interlude, I argue that the problem of induction, like so many other problems within AI, is a problem of knowledge representation. To the extent that AI-systems are based on linguistic representations of knowledge, these systems will face basically the same problems as did the logical empiricists over induction.

In a more constructive mode, I then outline a non-linguistic knowledge representation based on conceptual spaces. The fundamental units of these spaces are “quality dimensions”. In relation to such a representation it is possible to define “natural” properties which can be used for inductive projections. I argue that this approach evades most of the traditional problems.

A “symptomatic act” is an act that is evidence for a state that it has no tendency to cause. In this paper I show that when the evidential value of a symptomatic act might influence subsequent choices, causal decision theory may initially recommend against its own use for those subsequent choices. And if one knows that one will nevertheless use causal decision theory to make those subsequent choices, causal decision theory may favor the one-box solution in Newcomb's problem, and may recommend against making cost-free observations. But if one can control one's future choices, then causal decision theory never recommends against cost-free observation.

The main appeal of the currently popular “bootstrap” account of confirmation developed by Clark Glymour is that it seems to provide an account of evidential relevance. This account has, however, had severe problems; and Glymour has revised his original account in an attempt to solve them. I argue that this attempt fails completely, and that any similar modifications must also fail. If the problems can be solved, it will only be by radical revisions which involve jettisoning bootstrapping's basic approach to theories. Finally, I argue that there is little reason to think that even such drastic modifications will lead to a satisfactory account of relevance.

This note makes a contribution to the issue raised in a paper by Popper and Miller (1983) in which it was claimed that probabilistic support is purely deductive. Developing R. C. Jeffrey's remarks, a new general approach to the crucial concept of “going beyond” is here proposed. By means of it a quantitative measure of the inductive component of a probabilistic inference is reached. This proposal leads to vindicating the view that typical predictive probabilistic inferences by enumeration and analogy are purely inductive.

I attempt to complement my earlier critiques of human sociobiology, by offering an account of how evolutionary ideas might legitimately be employed in the study of human social behavior. The main emphasis of the paper is the need to integrate studies of proximate mechanisms and their ontogenesis with functional/evolutionary research. Human psychological complexity makes it impossible to focus simply on specific types of human behavior and ask for their functional significance. For any of the kinds of behavior patterns that have occupied human sociobiologists, the underlying proximate mechanisms are very likely to be linked to a broad spectrum of types of behavior, and we cannot expect that natural selection will have acted directly on any individual element from this spectrum. I illustrate this general point with a specific example, considering the traditional sociobiological account of human incest-avoidance and outlining an alternative approach to the phenomena. The example is intended to show the possibility of a more rigorous and sophisticated successor to human sociobiology, which I call “human behavioral ecology”.

The theory of evolution is supported by the theory of genetics, which provides a single causal mechanism to explain the activities of replicators and interactors. A common misrepresentation of the theory of evolution, however, is that interaction (involving interactors), and transmission (involving replicators), are distinct causal processes. Sandra Mitchell (1987) is misled by this. I discuss why only a single causal mechanism is working in evolution and why it is sufficient. Further, I argue that Mitchell's mistaken view of the causal mechanism in evolution prevents her from resolving the conflict between Dawkins and Brandon. I conclude that the unit-of-selection question remains very much alive.

In this note a recently developed quantum oscillating finite space cosmological model is described. The principle novelty of the model is that there is a quantum blurring of the classical singularity between cycles, instead of a singularity free bounce. Recently, Quentin Smith (1988) has argued that present theoretical and observational evidence justifies the belief that the past history of the universe is finite. The relevance of this cosmological model to Smith's arguments is discussed.

We claim that much of the confusion associated with the “tautology problem” about survival of the fittest is due to the mistake of attributing fitness to individuals instead of to types. We argue further that the problem itself cannot be solved merely by taking fitness as the aggregate cause of reproductive success. We suggest that a satisfying explanation must center not on logical analysis of the concept of general adaptedness but on the empirical analysis of single adapted traits and their causal relationship to changes in allele frequencies.

After presenting the major objections raised against standard formulations of the H-D method of theory testing, I identify what seems to be an important element of truth underlying the method. I then draw upon this element in an effort to develop a plausible formulation of the H-D method which avoids the various objections.

This paper is concerned with a recent argument of Jerry Fodor's to the effect that the frame problem in artificial intelligence is in principle insoluble. Fodor's argument is based on his contention that the mind is divided between encapsulated modular systems for information processing and ‘central systems’ for non-demonstrative inference. I argue that positing central systems is methodologically unsound, and in fact involves a muddle that bears a strong family resemblance to the basic error in dualism. I therefore conclude that Fodor's position on the frame problem should be rejected.

The classic charge against Freudian theory is that the therapeutic success of psychoanalysis can be explained without appeal to the mechanisms of repression and insight. Whatever therapeutic success psychoanalysis might enjoy would then provide no support for the diagnostic claim that psychological disorders are due to repressed desires or for the therapeutic claim that the gains in psychoanalysis are due to insight into repressed causes. Adolf Grünbaum has repeated the charge in The Foundations of Psychoanalysis (1984), arguing that Freud's response to it in what he calls the “Tally Argument” is woefully inadequate. Grünbaum claims that Freud's defense depends on the view that only psychoanalytic techniques can yield therapeutic effects, and therefore that the transience of some psychoanalytic “cures”, the existence of alternative treatment modalities, and the frequency of spontaneous remission undermine Freud's defense of psychoanalysis. I argue that, whatever the merits of psychoanalysis, Freud is not logically committed to any view as extreme as that attributed to him by Grünbaum; and, furthermore, Grünbaum's rendering of Freud is historically inaccurate.

Several prominent philosophers have held that physical properties are dispositions. The aim of this paper is to establish the following conjunction: if the thesis that physical properties are dispositions is unsupplemented by controversial assumptions about dispositions, it entails a contradiction; and if it is so supplemented the resulting theory has the consequence that either many worlds which seem to be possible worlds are not possible worlds or some properties which seem to be identical are not identical. In this way it is shown that a dispositional account of physical properties is implausible.

A proof is presented that a form of incompleteness in Quantum Mechanics follows directly from the use of unbounded operators. It is then shown that the problems that arise for such operators are not connected to the non-commutativity of many pairs of operators in Quantum Mechanics and hence are an additional source of incompleteness to that which allegedly flows from the EPR paradox. Finally, it will be argued that the problem is not amenable to some simple solutions that will be considered.

Doren Recker has criticized the prevailing accounts of Darwin's argument for the theory of natural selection in the Origin of Species. In this note I argue that Recker fails to distinguish between a deductive short argument for the principle of natural selection, and a non-deductive, long argument which aims at establishing that the principle has explanatory power in the various domains of application. I shall try to show that the semantic view of theories, especially in its structuralist form, makes it easy to distinguish between the two arguments and to explain how Darwin's long argument counts as one argument. I also raise a question about Recker's views on Darwin's mid-Victorian background, arguing that Newton's First Rule of Reasoning was not just a constraint on hypotheses involving unobservables, but a general request to keep conjecture and certainty apart.

The kinematical principle of Equal Passage Times (EPT) was introduced by Winnie in his 1970 derivation of the relativistic coordinate transformations compatible with arbitrary synchrony conventions in one-dimensional space. In this paper, the claim by Winnie and later Giannoni that EPT is a direct consequence of the relativity principle is questioned. It is shown that EPT, given Einstein's 1905 postulates, is equivalent to the relativistic (synchrony independent) clock retardation principle, and that for standard synchrony it reduces to an isotropy condition for contraction (and dilation) effects.

This critical note concerns Harold Kincaid's “Reduction, Explanation and Empiricism” (this journal, December 1986). Kincaid criticizes methodological individualism on several grounds. The present note argues that Kincaid fails at least in his attempt to show that it is false that individualistic theory suffices to fully explain social phenomena. Kincaid's main reason for claiming that individualistic theory is insufficient is that it cannot adequately explain social kinds. The present note contends that an individualist can suitably reinterpret the social talk in question and so succeed in explaining social phenomena. In some cases his explanatory factors will presumably be direct counterparts to the holist's explanatory social kinds, whereas in some other cases they may not be—arguably need not be.

The form of argument used by Popper and Miller to attack the concept of probabilistic induction is applied to the slightly different situation in which some evidence undermines a hypothesis. The result is seemingly absurd, thus bringing the form of argument under suspicion.

Tuomela (this issue, pp. 96–103) raises several objections to the analysis and critique of methodological individualism in my (1986). In what follows I reply to those criticisms, arguing, among other things, that: (1) the alleged reductions provided by Tuomela and others fail, because they either presuppose rather than eliminate social predicates or do not avoid the problem of multiple realizations; (2) supervenience does not guarantee that the social sciences are reducible, because merely describing supervenieence bases leaves numerous questions unanswered, and (3) the eliminativism that Tuomela favors verges on being self-refuting and is highly implausible short of a detailed empirical critique of the social sciences, something Tuomela does not provide and something there is little reason to think can be provided.

In an earlier paper (Dupré 1984), I criticized a thesis sometimes defended by theorists of probabilistic causality, namely, that a probabilistic cause must raise the probability of its effect in every possible set of causally relevant background conditions (the “contextual unanimity thesis”). I also suggested that a more promising analysis of probabilistic causality might be sought in terms of statistical relevance in a fair sample. Ellery Eells (1987) has defended the contextual unanimity thesis against my objections, and also raised objections of his own to my positive claims. In this paper I defend and amplify both my objections to the contextual unanimity thesis and my constructive suggestion.