 Practicing what Popper had preached—conjectures and refutations—neopositivism ran its course, catapulting its chief rival, Popper, initially a contentious misfit, to carry the richest philosophy out of interwar Vienna.In the early 1950s, studying philosophy of quantum mechanics under Popper at the London School of Economics, Paul Feyerabend found falsificationism to be not a breakthrough but rather obvious, and thus the controversy over it to suggest instead endemic poverty in the academic discipline philosophy of science.And yet, there witnessing Popper's attacks on inductivism—"the idea that theories can be derived from, or established on the basis of, facts"—Feyerabend was impressed by a Popper talk at the British Society for the Philosophy of Science.