Abstract

Based on an idea of Ajdukiewiu, a method of equifunctionality is developed to provide a formal explication of the notion of sameness of use relative to some system of rules. Given this, a set‐theoretic explication of Lauener's context dependent conception of synonymy is introduced by looking at languages of ropositional logic, and compared both with Ajdukiewicz's original conception and with Carnap's explication of synonymy based on his method of extension and intention