 It was as early as 1935 that Feigl, at the above quoted International Congress for the Unity of Science in Paris, gave a talk on “Sense and Nonsense in Scientific Realism” (see Feigl 1936; further Neuber 2011, p. 169). In 1943, then, he published a paper titled “Logical Empiricism.” There, he argued that the term ‘real’ is employed with good reason (both in daily life and in science) to designate “that which is located in space-time and which is a link in the chains of causal relations” (Feigl 1949, p. 16). In this sense, the reality of atoms (and other theoretically postulated entities) is equally capable of empirical test as the reality of rocks and trees. Accordingly, reality should be ascribed to whatever is confirmed as having a place in the spatiotemporal-causal system. After all, this—realistically inspired—point of view directly emerged from the liberalization of the logical empiricists’ criterion of meaning. It was indeed the result of the insight that “most of our knowledge, and especially almost all of the more interesting and important part of it, is highly indirect. It is shot through with interpretation, construction, and inference, and consequently is dependent on very general assumptions” (ibid., p. 14).