Psychologic is a formal system and relationship within which psychological processes are defined. The language people ordinarily use to formulate, think, and talk about psychological phenomena is organized by Jan Smedslund into a set of propositions aimed at identifying the generalities which underlie human behavior. In this way, psychologic illuminates the conceptual system of psychology embedded in ordinary language. This book continues Professor Smedslund's search for stable theoretical structures to explain the meanings that are part of all psychological investigation.