This paper intends to expose elements of a Charles S. Peirce's epistemological doctrine, called by him Falibilism. The aim is to show how this doctrine emerge itself from the author's metaphysical theories, like his Evolutionism and categorical structure of Reality, forming a duet with his ontological conception of Chance. In fact, the Falibilism will be considered as the doctrine that is consequence of the Peirce's doble face indeterminism, i.e., at same time ontological and epistemological.
Peirce; epistemology; metaphysics; chance