 Moreover, Feigl’s account of factual reference is intimately linked with the concept of truth. In general, the meaning of a sentence consists, according to the theory proposed by Feigl, in its truth conditions (see Feigl 1950b, p. 191 and Feigl 1981, p. 43). These truth conditions, in turn, are treated compositionally: they obtain when the entities to which we refer stand in the relations to which we refer, that is, independently of the conditions of the corresponding scenario of verification. Accordingly, relations between the ‘factual referents’ of theoretical terms serve as ‘truth makers’ for theoretical statements. Feigl therefore concludes that by adopting a “semantic metalanguage” (as he could find it in the works of Tarski and the later Carnap) we are in a position to employ “a conceptual model in which statements as well as the states of affairs that render these statements true, can be represented” (Feigl 1950a, p. 49).