Abstract

In his magnum opus, The Logic of Scientific Discovery (first published in German in 1934, English translation, 1959), Karl Popper make two fundamental philosophical moves. First, he relocates the center of gravity of the philosophical treatment of science around what he calls the problem of demarcation. This is the problem of distinguishing between science, on the one hand, and everything else on the other. (By contrast, his contemporaries of the Vienna Circle, whose positivism would prove the most influential brand of empiricism of the day, located the center of gravity around the problem of linguistic meaning, and use a criterion according to which a statement is meaningful to the extent that one can identify verification conditions for it.) Popper excludes from science such things as logic, metaphysics, Freudian psychoanalysis, and Marx’s theory of history. Second, Popper propounds the doctrine of falsification, which handles the problem of demarcation, as well as answers David Hume’s shattering attack on science as the premier form of knowledge centuries before. The arguments he mounts for falsification would function also as an attack on any account of the scientific enterprise that, like positivism, adheres to the idea that science progresses logically from instances (given in observation or experience) to the high-order generalizations characteristic of mature scientific theory. In this small space I shall undertake neither to illuminate the nuances of Popper’s position, nor to trace the (numerous) lines of criticism that have accumulated against it some seventy years later. I shall busy myself instead with tracing a trajectory of thought on the subject of scientific reasoning and its relation to individual decision-making, reflecting on Popper’s contribution and on how his legacy might be further enlarged.