 Hintikka (1973a) initiated the application of GTS to the study of natural language. This work was continued notably by Hintikka &amp; Kulas (1983, 1985), where game-theoretical rules for such items as negation, anaphoric pronouns, genitives, tenses, intensional verbs, certain prepositional constructions, and proper names were given, and the distinction between abstract meaning and strategic meaning  drawn.[14] 