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BOOK REVIEWS 193 The foregoing account of Favrholdt's book does not bring out the wealth of detail it contains , nor does it adequately record the minuteness of the steps he takes when dealing with particular subjects in the Tractatus. I have also made no effort here to evaluate the quality of his work, or the plausibility of his main thesis. Both of these tasks would require a much longer review than space allows. What I have attempted to suggest is that this is a bold, radical, sweeping, unorthodox, and destructive account of the Tractatus, an4 that as such it must take its place among the major commentaries on Wittgenstein's early philosophical development. AvRvm ST~LL University o] Cali]ornia, San Diego Mind, Matter and Method: Essays in Philosophy and Science in Honor o] Herbert Feigl. Edited by Paul K. Feyerabend and Grover Maxwell. (Minneapolis: University of Minnesota Press, 1966. $9.75.) Another Festschri]t, this time to Feigl, drawing together philosophers from the logical empiricist and "analytical" camps (with a dissenter or two), a few psychologists, and one physicist. About half the contributions are devoted to the mind-body problem, offering various emendations to or criticisms of Feigl's neural identity theory. Except for Matson's lively, if inconclusive, dissolution of the problem, it is all pretty stale, including the attempts of psychologists Meehl and Stevens to scientize the problem and Bruce Aune's resurrection of epiphenomenalism without the credits. Part II, on various problems in induction, empirical confirmation, and "method," includes many notables, Carnap and Popper among them, and much is heard of old positivist problems, including the crucial test, the verifiability principle, observational bases to knowledge, and so on. This section ends with a curiously discordant piece by Professor Veatch, claiming to show that Feigl's latest declarations about empiricism are quite compatible with the cosmological proof of God's existence, since all Feigl demands is a toehold in experience. Part III consists of papers about problems in physics, the most interesting of which seemed to me to be E. K. Hill's argument against the view that classical mechanics is a limiting case of quantum mechanics, and Yourgrau's dampening of an enthusiasm for a topological interpretation of elementary particle physics. In sum: a string of papers, some good, many indifferent, on a variety of topics, some alive, some not, without the saving structure of a common theme. It is clear that the Festschri# idea has got out of hand. It is not clear why anyone would pay the high price for this volume, all of which is hardly going to be of interest to any particular individual, and most of which consists of contributions containing ideas readily available in other forms. A. R. Louct~ Claremont Graduate School The Coherence Theory o] Truth. By Haig Khatchadourian. (London: Constable and Co., Ltd., 1961. Pp. xi ยง 230.) This is a revision of a doctoral dissertation written at Duke University. The professed aim of the work is to discover the truth or falsity of the coherence theory of truth and thereby take the first step toward the more important task of answering the questions to which that theory is addressed (p. 230). Following an exposition of the theory as set forth by Bradley, Bosanquet, and Blanshard, Khatchadourian devotes two chapters to the "refutation" of the doctrine of internal relations. The three chapters following contain "refutations" of coherence as the criteria of truth, coherence as the nature of truth, and the theory of degrees of truth, respectively. Since the doctrine of internal relations and each of the latter two theories is presupposed by most philosophers who hold the coherence theory of truth, the order of the exposition is designed to constitute a refutation in depth of the latter theory. Since the many detailed arguments set forth within the work do not lend themselves to a 194 HISTORY OF PHILOSOPHY brief summary, I shall present some points made in the treatment of the doctrine of internal relations which furnish clues about the philosophical perspective from which Khatehadourian makes his analysis. Some relations (such as identity and difference) are in fact external, and this in itself makes the doctrine of internal...