The authors point out that in Freud's thought fantasy surpasses ontogeny, becoming history of phylogeny through collective and prehistoric Oedipus. Unlike Freud, who followed a positivistic epistemology, the authors emphasize the individual meanings of fantasy, according to the present constructionistic epistemology.

First, an outline of this point of view is presented. Secondly, a theoretical approach between fantasy and repression — in the light of the concept of “compulsion to know” — is suggested. A clinical vignette follows to illustrate the above mentioned principles.