In the case of the Einstein-Podolsky-Rosen problem und Bell's proof it is shown how, contrary to Kuhn and Lakatos, a "purely metaphysical" thesis became falsifiable and falsified by an "crucial" experiment in the strict sense so that the followers of an older paradigma changed their opinion on rational grounds and not by an "experience of conversion" or by "dying out".

W. Stegmüller sees the decisive difficulty of the Laplacean interpretation of Carnaps probability in the lack of the required equiprobable possibilities. It is argued that the required equiprobabilities in physics are given by statistical mechanics and can easily be transferred from physics to general statistical problems.