Abstract

This book is an excellent collection of papers which partly spring from, and partly bear on the Study Group on the Unity of Knowledge held in various universities, October, 1967-March, 1970. The papers all bear on the problem of reduction. In "Unity of Physical Law and Levels of Description," Ilya Prigogine argues that organized structures need physical laws of organization, not of entropy only, to explain their genesis and operation." The editor’s paper, "Reducibility: Another Side Issue," argues, following Polanyi, that living things as machines already transcend physics, since they demand both chemical and engineering principles for their explanation." "How is Mechanism Conceivable?" points out that ordinary ways of talking about and explaining behavior, i.e., as involving intention and purpose, differs in logic from mechanistic explanation. But this difference in logic of the two languages is "never an obstacle to the reduction of one theory to another, indeed, there is always such a noncongruence of the conceptual mesh." Anthony J. P. Kenny’s "The Homunculus Fallacy" argues against "the reckless application of human-being predicates to insufficiently human-like objects." In "Behavior, Belief, and Emotion," A. C. MacIntyre argues for the thesis that "there is no necessary connection between at least some emotions and particular forms of behavior." In "The Critique of Artificial Reason," H. Dreyfus criticizes both the empirical and a priori arguments for optimism underlying the work in artificial intelligence. It displays the underlying philosophical assumption inherent in Western philosophical tradition since Plato. The last two papers concern Polanyi’s theory of knowledge. In "Tacit Knowledge and the Concept of Mind," W. T. Scott shows how Ryle’s "Concept of Mind can be significantly extended by considering certain features of the philosophical position that Michael Polanyi has developed around the concept of tacit knowing." R. S. Cohen’s "Tacit, Social and Hopeful" discusses the difficulties in Polanyi’s epistemology and the merits of the logical reconstruction work in science. Only the papers by Dreyfus and Scott have been previously published. Throughout the collection, the editor has provided useful introductory remarks focusing upon the unifying themes in the collection.—A. S. C.