This work sets out to perform a psychoanalytic inversion of transcendental philosophy, taking Kant's synthetic a priori judgments and reading them in terms of a foreclosed Kantian category, that of the analytic ""a posteriori"". Working primarily out of Freudian and Lacanian problematics, the author not only subjects Kantian thought to psychoanalytic questioning, but also develops a systematic critique of metapsychology itself, disclosing and assessing its own paralogisms, antinomies, ideal, and ethics. In this way, the work provides a reflection on the tensions between the Enlightenment project of critique and psychoanalytic theory.