Some basic problems with the use of "psychologic" in the study of memory

In his paper, "Psychologic and the study of memory", Smedslund attempts to construct a logical system consisting of axioms, propositions, lemmas, and corollaries in which the supposed principles of memory research can be show n to be necessarily true. This in turn is intended to be subsumed within a broader system of psychological truths or "psychologic". In this commentary , I examine, in turn, the authority for these claims, the account of necess ary truth, the possibility of conceptual development in memory research, an d the nature of the "principles" that Smedslund describes.