An admirable introduction to inductive logic, this book is both informative and lucidly written. After an excellent introductory chapter comparing deductive with inductive logic, the author presents Hume's problem of induction and several proposed methods for solving or dissolving it, none of which are adequate. Chapter III is devoted to Goodman's paradox about "grue" and the problems it poses for induction. No attempt, however, is made to develop a calculus of projectibility, which is needed to solve this new riddle of (...) induction. The systematic part of inductive logic is presented in the fourth and longest chapter. This chapter begins with a brief account of elementary truth functions which the author then uses to present an updated and rather elegant version of Mill's methods. The rest of the chapter is devoted to the development of the probability calculus in a systematic manner, without, however, any method of assigning initial probabilities. An account of statistics is appended, which is too brief to be of much value. The fifth chapter is devoted to interpretations of the probability calculus. The frequency interpretation of probability is described as an adequate account of descriptive probability. Two interpretations of inductive probability are presented: Carnap's "logic" interpretation and the frequency interpretation of Reichenbach. Both, however, are found lacking in ultimate justification. Though not flawless, this book is of very high quality.—F. S. M. (shrink)

This study is concerned with certainty and examines the work of Dewey for the light he sheds on this problem. Hart concentrates on the process of verification, the final stage of inquiry in Dewey's theory. He does this because he believes that, according to Dewey, through the process of verification we may attain "flexible" certainty. The first chapter discusses the background of the problem. The second chapter, "A Dewey Dictionary," contains passages selected from Dewey's works on about sixty topics which (...) Hart considers important for his later discussion. In the third chapter, a chronological account of the development of Dewey's theory of inquiry and his views on verification is meticulously presented. The fourth chapter is devoted to a systematic presentation of the place of verification in Dewey's philosophy. In the fifth chapter are the author's critical reflections: Hart holds that the basic principles of Dewey's theory cannot be justified but must be taken on faith. Here Hart does not seem sufficiently appreciative of Dewey's pragmatism. Dewey could answer: such principles are adopted because they are fruitful and will be maintained only so long as they continue to be fruitful. An epilogue concludes the study.—F. S. M. (shrink)