Peirce was a great philosopher. His contributions to philosophy concerned almost every subject of philosophy. Hacking commented that "he finished almost nothing, but he began almost everything" (Hacking 1983:61). Perhaps this is why his importance and influence are being rediscovered again and again. Many contemporary philosophers take note of his insights, or, while touching — intentionally or not — upon problems which he had already frequently dealt with, go back to his works to seek instructions.