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From the examination of some psychoanalytical concepts with a psychopathological aim proposed over the last fifty years, we will show how their epistemology touches the critical point of the analyzes of the contemporary social and of the relationship that the subject maintains with this social (dereliction). We will focus on the articulation of these concepts in the field of social and discourse, their constructions with regard to theory and clinic, to identify from their logic the crucial point for psychoanalysis and its theory.