Abstract

In his monograph on the Vienna Circle Kraft writes that “one of the earliest and most fundamental insights of the Vienna Circle” was “that no deductive or logical justification of induction is at all possible”. In Logik der Forschung Popper developed his philosophical conception starting from a very emphatic critique of logical positivism and its alleged essential feature inductivism. Although Kraft’s assessment is essentially correct, as the present paper intends to show, Popper’s opinion prevailed and came to dominate philosophical handbooks for decades. However, it must be admitted that the Vienna Circle attitude towards induction might have been misleading, and in a sense invite misunderstandings. Whilst the members of the Schlick-Kreis clearly recognized the impossibility of any logical justification of induction, some of them believed that induction was a part and parcel of scientific conduct and instead of denying its existence they tried to change its epistemological status. The aim of this paper is twofold. Firstly, it is to display this evasive policy—namely, how to keep induction rationally, nevertheless without justification. Secondly, it is to demonstrate that Popper’s criticism of the 1930s was already by then an anachronism.