Continuing to explore the philosophical, moral-psychological, socio-psychological, legal-psychological and rhetorical problems of criminal proceedings, the author, using the methodology of system analysis in order to formulate and substantiate the problem within the framework of this article, identifies the main directions of the philosophical and scientific foundations of a realistic approach to understanding and cognition of the truth, including in criminal proceedings. The article analyzes the significance of the classical (correspondent) theory of truth as the initial epistemological basis of a realistic approach to understanding and cognition of truth in any sphere of cognitive activity, including in realistic epistemology, lawmaking, theory and practice of criminal proceedings. The author notes that the idea of truth as an integral part of the worldview of legislators, scientists and practicing lawyers is constructively used in the construction of a legally correct and fair preliminary investigation and trial in the Russian Federation, corresponding to the ideals of a democratic rule of law and standards of modern International Law, only when the court and participants in criminal proceedings on the part of the prosecution profess a non-relativistic, and a realistic approach to understanding and cognition of truth in the spirit of the correspondent (classical) theory of truth, the provisions of which in a dialectically “removed”, developed form are an integral part of realistic epistemology, including the dialectical-materialistic concept of cognition.