Asking from the truth of Cogito as the basis of knowledge, this paper tries to analyze all possible answers in Descartes’ philosophy. Inductively, four possible answers are open to consideration: either Cogito is true 1) based on argumentation, 2) because it is clear and distinct, 3) because of being innate, or, lastly, 4) because of intuition. All of these explanations either entail accepting some prior knowledge to Cogito or fall in a vicious circle. A proper way to explain Cogito’s truth is a new perspective to the meaning of intuition in Descartes’ philosophy. Through this perspective Cogito is a presential experience. Lack of any gap, separation, and disjunction in this presential experience is the reason for the truth of Cogito because this lack is the lack of error’s cause.
