And thus universal empiricism reveals itself as genuine skepticism, which has falsely been ascribed to Hume in such an unlimited meaning; for, with mathematics, he left us at least one secure touchstone of experience, whereas genuine skepticism permits absolute no such touchstone (which can never be encountered except in a priori principles) even though experience consists indeed not of mere feelings, but also of judgments.tion to Sophistry and Scepticism (Edinburgh:.