Before revision: From 1930 onward, Karl Popper had refuted any positivism by asserting falsificationism, which Popper claimed had killed positivism, although, paradoxically, Popper was commonly mistaken for a positivist.Popper, "Against big words", In Search of a Better World (Routledge, 1996), pp 89-90.Hacohen, Karl Popper: The Formative Years (Cambridge U P, 2000), pp 212–13.
After revision: From 1930 onward, Karl Popper attacked positivism, although, paradoxically, Popper was commonly mistaken for a positivist.Popper, "Against big words", In Search of a Better World (Routledge, 1996), pp 89-90.Hacohen, Karl Popper: The Formative Years (Cambridge U P, 2000), pp 212–13.