The essay aims to discuss a global skepticism about epistemic justification called Agrippa's Trilemma. Based on its exposition, the article will deal with the infinitist alternative of justification, traditional foundationalism and the hypothesis of the infallibility of introspection. It concludes that introspection beliefs are not verifiable propositional attitudes, representing an advantage to the infinitist theory. Keywords: Skepticism; Infinitism; Agrippa’s Trilemma; Epistemic Justification.