The paper is a comment on the article "Psychology in view of the types of scientific rationality" by P.A. Myasoyed, analyzing methodological sets lying at the basis of different psychological conceptions - dualism, monism, pluralism. Classical psychology proceeded from dualism represented in R. Descarte's works. Non-classical psychology gravitated towards monism, a philosophy developed by B. Spinoza. The author expresses a supposition that post-non-classical psychology may be based on the pluralistic set on which G.V. Leibniz's conception is founded, and describes post-non-classical science as a "grid" of complementary conceptions.