This work analyses the epistemological foundationism, one of the most important alternatives of answers to the problem of the epistemic return. In particular, the author intends to systematize those he believes to be the basic difficulties that the foundacionist proposal must overcome to solve, reasonably, the problem of return. Thus, he follows the two principal subjects through which the contemporary foundationism moves, namely, the internalistic truth and the externalistic truth. In this follow up, the notions of 'epistemic justification' and of 'basic belief' are preferably evaluated.
Epistemic Justification; Problem of Return; Foundationism; Basic Belief; Internalism; Externalism