Conventionalism
Conventionalism
Any doctrine according to which a priori truth, or the truth of propositions of logic, or the truth of propositions (or of sentences) demonstrable by purely logical means, is a matter of linguistic or postulational convention (and thus not absolute in character). H. Poincare (q.v.) regarded the choice of axioms as conventional (cf. Science et hypothese, p. 67). — A.C.