 It looks as if Peirce in his later years (after ca. 1905) tried to solve this problem by giving his phenomenological claims a metaphysical underpinning. For him metaphysics is that part of philosophy that gives an account of the results of what philosophy in the form of Phenomenology and as a normative science has accomplished. Here Peirce exploits the fundamental idealist premise that there is a necessary isomorphism between thought and being: according to him, 