| Scottish philosopher David Hume is considered one of the greatest skeptics in the history of philosophy. Hume thought that one can know nothing outside of experience, and experience—based on one’s subjective perceptions—never provides true knowledge of reality. Even the law of cause and effect was, for Hume, an unjustified belief: If one drops a ball, one cannot be certain it will fall to the ground. Rather, it is only possible to recognize through past experience that certain pairs of events (dropping a ball, the ball striking the ground) have always accompanied one another. |