The objective of this article is to demonstrate that between psychoanalysis and the scientific thought we could talk of compatibility. To reach this objective we analyze how logic, when becoming mathematics, takes advantage of a plural thought and no of an illusion of unity of reason, which would be placed in classical logic as an absolute achievement. Next, we will show how Freud, in "The interpretation of Dreams" also places, with his thesis about the functioning of the unconscious, the primacy of classical logic in question, mainly the principles of the third excluded, the non-contradiction, and the principle of identity.
Psychoanalysis; Logic; Compatibility