Proceedings of the American Academy of Arts and Sciences, Volumen80

abstract acts of communication ALFRED TARSKI ALONZO CHURCH analysis analytic ANDRZEJ MOSTOWSKI approach basic behavior biological C. I. LEWIS Carnap Chicago cognitive significance concepts criterion Cybernetics defined definition denotation derived distinction dynamic empirical empiricism entities experience expressions formal Frege Freud function Heinz von Foerster Hempel human hypotheses hypothetical constructs idea inductive logic inference instinct interpretation intervening variables investigation Journal knowledge L. E. J. Brouwer language laws linguistic London mathematical mathematical logic mechanisms ment mental method motivation nature object observable facts organization phenomena Philipp Frank Philosophy of Science physical possible Prediction Press primitive principles probability problem processes psycho psychoanalysis psychology reference relations Research rules scientific scientists semantical sense sentences signific significist social science Society sociology statements structure superego symbols Synthèse theoretical theory of meaning tion truth unconscious Unity of Science verifiability W. V. QUINE words York