“This book may be regarded as a third volume of the series which I have called “Studies in Semantics”, two volumes of which were published earlier. However, the present book does not presuppose the knowledge of its predecessors but is independent. The semantical terms used in the present volume are fully explained in the text. The present method for defining the L-terms (for example, ‘L-true’, meaning logically true’, ‘analytic’) differs from the methods discussed in the earlier Introduction to Semantics. I now think that the method used in this volume is more satisfactory for languages of a relatively simple structure”.