While the scientist works essentially with what he observes, with the measurable properties of nature, the philosopher of science is concerned to formulate the conceptual foundations of the scientific method. In this systematic study, Professor Achinstein analyzes such concepts as definitions, theories, and models, and contrasts his view with currently held positions that he finds inadequate.

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Peter Achinstein is a professor of philosophy at the Johns Hopkins University. His previous books include Concepts of Science, Law and Explanation, The Nature of Explanation, Particles and Waves, and The Book of Evidence.

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