Kant describes what he does in the first Critique as transcendental philosophy. And he insists that this discipline is entirely new, that something like it was never tried before. “[I]t is a perfectly new science, of which no one has ever even thought, the very idea of which was unknown, and for which nothing hitherto accomplished can be of the smallest use, except it be the suggestion of Hume’s doubts” (Prolegomena,’ 9-10).