To Speak About What's Involved In The Psychoanalytic Act, One Has To Speak About Logic

In the course of Seminar XIV The Logic of Phantasy and Seminar XV The Psychoanalytic Act Lacan takes his project for a science that includes psychoanalysis to new heights. Using a deMorgan-like transformation he establishes a truth equivalence between Descartes 'I think therefore I am' and his own axiom for the subject of lack 'Either I do not think or I am not'. Beginning with negation and contradiction, this paper looks to underscore the inadequacy of classical logic to account for the subject of the unconscious.…