The article is devoted to the analysis of understanding of the meaning of “rationality” of the rational activity by a modern person. According to the author, the achievement of the goal is impossible without solving the problem of studying the epistemological foundations of post-non-classical rationality which dominates the system of civilizational values, since the basis of the meaning of “rationality” always has a certain type of rationality. At the same time, the author pays special attention to such tools of cognitive activity of a person as information and knowledge.
