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BOOK REVIEWS 497 interaction and interdependence. Our practice can be governed by that ontological hypothesis. Much of Timpanaro's ranting and raving and name calling rests upon his unhelpful conflation of the epistemological and the ontological and upon a false dichotomy between materialism and idealism that no longer is or ought to be the basic and important issue in Marxism. DONALDC. LEE University of New Mexico Causing, Perceiving and Believing: An Examination of the Philosophy of C. J. Ducasse. By Peter H. Hare and Edward H. Madden. (Dordrecht and Boston: Reidel, 1975. Pp. vii + 211. $26.00) Hare and Madden have performed a service to the philosophical community in summarizing and evaluating the contributions to philosophy of C. J. Ducasse. They have distilled from ten books, scores of articles, and some unpublished manuscripts of Ducasse, analyses of causality , sensation, perception, substance, agency, belief, knowledge, mind, beauty, education, and religion that can fairly be regarded as the philosophy of Ducasse. They point out some inconsistencies in Ducasse's views, but they suggest emendations to overcome the difficulties-emendations that Hare and Madden have developed in their own writings, so that the reader is offered, in effect, a composite Ducasse-Hare-Madden system of philosophy. I agree with most of the authors' judgments regarding the defects of Ducasse's views, but I doubt that their proposed improvements succeed in making the overall vision coherent. In the first three chapters the authors explain Ducasse's theories of causality and agency and claim that his account of causality as a necessary but nonlogical connection was a significant advance over Hume. They consider Ducasse to have been wrong in limiting causality to events and in maintaining that it is directly observable. They argue that an effect is deducible from the "nature" of its cause, although not from the nontheoretical description of its cause. This proposed improvement on Ducasse and Hume seems to me either a mere gloss on Hume or a muddle. If Hare and Madden mean that scientific theories establish entailments between concepts such as pressure and volume or mass and acceleration, and that the explanatory and predictive success of such entailments serves as a criterion of causal processes, they are right. But what they have identified is not a relation of nonlogical necessity but rather two relations: a logical relation between two theoretical concepts, and a contingent relation between two classes of events that correspond to the theoretical concepts. If, on the other hand, they mean to agree with Aristotle and the scholastics that the nature of a thing is an entity or process inside it that compels it to behave as it does, then, like their ancient predecessors, they make causal explanation into a "dormative virtue" fallacy; for the nature of a thing is then identical with its causal powers, and the latter follow vacuously from the concept of its nature. They seem to ignore the fact that any conceptual relation between theoretical concepts is only a rough approximation to actual events. It is a logically necessary truth that EMF is proportional to current times resistance, but it is neither logically nor nonlogically necessary that a booster battery will start a recalcitrant car. In brief, theoretical relations are idealizations of real processes in nature. Hare and Madden claim that their conceptual connection analysis of causality blunts the edge of the "logical connection argument" that motives cannot be causes of actions. They fail to realize that the "logical connection argument" applies to the nontheoretical descriptions of motives and actions (there are no theories worth considering), while their own conceptual relation analysis applies only to theoretical descriptions of natural processes. The Hare-Madden emendation produces special difficulties when applied to Ducasse's account of human agency and mind-body interaction. Ducasse defended the dualist conception of voluntary action as bodily movement caused by mental volitions. The possibility of 498 HISTORY OF PHILOSOPHY such causal intereaction makes some sense on Ducasse's basically Humean view that causality can hold between any two kinds of event but not on the Hare-Madden view that cause and effect must be conceptually related. For we have no well-confirmed theories, nor is it likely that we ever will...

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