This work, written by a young Russian logician at the Institute of philosophy in Moscow, fills a long-empty gap in our literature about many-valued logics. The only previous monograph on many-valued logic in English is primarily mathematical and technical, and only in its introduction does it treat the philosophical problems raised by many-valued logic.

In the present work, the author takes up such questions as the ‘unity’ and ‘diversity’ of logic as a whole, the empirical relationship of logic to its object domains, and the relationship between ordinary thinking on the one hand and two-valued and many-valued logics on the other. He also treats briefly the relationship between many-valued logic and the criticisms raised by dialectical logic against traditional formal logic, a section which despite its brevity will be useful to those who are interested in Soviet philosophy.