Abstract

The article attempts to reconstruct the solution of the fundamental for the Anglo-American historical school (T. Kuhn, I. Lakatos, P. Feyerabend) problem of incommensurability, proposed by Helmut Spinner, a prominent representative of German critical rationalism (hereinafter referred to as CR). It is shown that this solution became possible on the way of rethinking the shortcomings of the orthodox CR of K. Popper and H. Albert, the main one of which Spinner saw in “scarcity” pluralism and criticism. To overcome it, he considered it necessary to develop the KR in the direction of “pluralistically extended fallibilist criticism” of the Feyerabend persuasion with some innovations. Spinner’s new version of the CR, was based on the following three fundamental principles: 1) the principle of radicalization of pluralism (hyperpluralism); 2) the principle of the infallibility of fallibilism (hyperfallibilism) (Fallubilität des Fallibilismus); 3) the principle (requirement) of the minimum commensurability of theories. The essence and content of the third principle is as follows. Minimal commensurability means that competing theories are commensurate, at least in one essential point: commensurability of this kind is mediated by “transition theories”. Incommensurable theories are by no means useless, for thanks to “transition theories” they can become commensurate, at least in a minimal sense. And this minimum commensurability is the most essential and desirable for theoretical pluralism, since only it provides the maximum criticism of alternative theories, thereby expanding the possibilities of confrontation and strengthening pluralistic criticism in general.