Gesammelte Werke in deutscher Sprache

In his investigations of the problem of induction and the problem of demarcation - the two fundamental problems of the theory of knowledge - Popper criticizes in great detail apriorism (Kant, Fries and Nelson) and logical positivism (Wittgenstein, Schlick and Carnap). He also gives a severe criticism of conventionalism (Poincaré, Duhem and Dingler), and presents his own new and distinct solution to the two problems: There is no such thing as induction, and it is only using the criterion of falsifiability and methodological rules that makes it possible to distinguish between empirical sciences on the one hand and mathematics, logic and metaphysics on the other. It was not until 1979 that the remaining manuscripts were published, along with an introduction and many new notes by Popper. And it was not until 2009 that an English translation was published (Routledge). To this new edition two new appendices (1993), a postscript (2010) and many new notes have been added.
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