Abstract

Wilkinson and Weaver have given a readable English translation of this highly influential work in which Perelman and Olbrechts-Tyteca point out historical and systematic inadequacies in much of contemporary logic and methodology. Since Descartes, philosophy has presupposed that all reason is self-evident and all proof is apodictic. The central thesis this work develops is that those areas outside the calculations of formal logic need not be dismissed as nonrational or meaningless. The "new rhetoric," by challenging the self-evidence of reason and by opening the mind to induction through speech, extends the concept of reason beyond the limits of a system of formal deductive logic. While retaining much respect for modern logic, Perelman and Olbrechts-Tyteca find the foundation for their theory in ancient philosophy, particularly in Aristotle. The proof which the authors call "the new rhetoric" Aristotle calls "dialectical proof," or the proof based on reasoning from generally accepted opinions. The "new rhetoric," however, both expands and neglects aspects of the ancient dialectic. "New rhetoric" will not be limited simply to spoken words. This work is primarily a systemization of rhetoric through the analysis of methods of proofs in the humanities, law, and philosophy. The social character of language plays a central part in the authors' idea of rhetoric and argumentation. The starting point of the investigation is not definitive truth, but the opinions of men expressed in language. Apodictic argumentation in contemporary methodologies has as the condition for its possibility normal linguistic expressions.--D. S. S.