Habermas's transcendentalism in Knowledge and Human Interests ( KHI) deserves to be reappraised for a number of reasons. Prevailing conceptions of strong transcendental arguments, which inform many of his critics, cannot be sustained. The analytic reception of Kant suggests a more modest role for them that is remarkably similar to Habermas's claims for the paradigm of rational reconstruction. Hence a reinterpretation of transcendentalism provides a new basis for establishing a continuity between his early and later work. Habermas's underlying argument structure (...) owes much, albeit unconsciously, to Kant's concept of a regulative idea. Only the "as if" status of regulative ideas allows one to make sense of the metacritical structure of KHI and Habermas's transcendental arguments emerge as deeply hermeneutic in character rather than logical in any formal sense. (shrink)