 Feigl’s role in the development of twentieth-century analytical philosophy is not to be underrated. His 1950 article on “Existential Hypotheses” can, as has been argued (cf. Neuber 2011), be regarded as a ground-breaking contribution to the debate over scientific realism within the analytical tradition. In particular his focusing on the semantic notions of reference and truth turned out as instructive for the following development, as it is represented in the (programmatically diverse) writings of Richard Boyd, Larry Laudan, and specifically Hilary Putnam. In recent times, the attempt has been made to revive Feigl’s point of view by systematically exploiting the idea of “choosing the realist framework” (see Psillos 2011). Similarly, Feigl’s analysis of the mind-body problem exerted remarkable influence on the philosophical discourse of the second half of the twentieth century. Thus, according to Jaegwon Kim, “it was the papers by Smart and Feigl that introduced the mind-body problem as mainstream metaphysical Problematik of analytical philosophy, and launched the debate that has continued to this day” (Kim 1998, p. 1). To be sure, alternative approaches, such as Putnam’s ‘functionalism’ or Donald Davidson’s ‘anomalous monism’ came up quite early in the discussion. Nevertheless, Feigl’s (and Smart’s) account “helped set basic parameters and constraints for the debates that were to come—a set of broadly physicalist assumptions and aspirations that still guide and constrain our thinking today” (ibid., p. 2)