The Two Fundamental Problems of the Theory of Knowledge

Karl Popper described Die Beiden Grundrpobleme der Erkenntnistheorie - The Two Fundamental Problems of Knowledge - as " above all about... the crisis of physics. It asserts the permanence of crisis; if it is right, then crisis is the normal state of a highly developed rational science.” Finally available in English for the first time, it is a major contribution to Twentieth century philosophy.