Abstract

The goal of the paper is to expound a notion of conceptual apparatus, by revealing structure and functions of objects it designates. The notion has been developed by Kazimierz Ajdukiewicz in the mid of 30ties, within a standpoint of radical conventionalism. According to its proponents, a picture of world one bears is not stated directly by the data of experience, but depends on conceptual apparatus chosen. Ajdukiewicz defines the notion consequently, referring it to a set of all meanings attributed to expressions in a closed and compact language. Nevertheless, it turns out to be vague, since it inherits the vagueness from presupposed categories, especially from ambiguously used category of meaning