Allameh Tabatabaee pays a special attention to the Evidents, in his Epistemology. He has exhibited his own foundationalism by emphasizing the evidential acknowledgements and their foundational role on the structure of Epistemology. The Infallibility of the preliminary acknowledgements and their importance in the epistemology of Allameh Tabataba’i has made his view be shown as the infallible foundationalism. Indubitably, the problem of the certain knowledge and its value of epistemological in his Epistemology has been the main agent in choosing this type of foundationalism. The non-regressive approach in the theoretical acknowledgements is considered as the main reason used by Allameh Tabataba’i in his foundational views. In this field, he considered the relations between theoretical acknowledgements and evidential acknowledgements based on the relation of geniture. However, he denies such a relation between evidential acknowledgements and the principle of contradiction. In Allameh’s Epistemology, the principle of contradiction is not considered as a basic belief, but as the basic of propositions and the most important logical and theoretical bankroll that dominates the mankind’s thinking, while not paying attention to thi