Habermas' claim to provide a critique of reification by means other than marxian ones requires him to transpose not only meaningful freedom, but also a dialectical view of social becoming, into terms com patible with linguistically mediated intersubjectivity. In order to remain critical of reification as colonization, he thus finds himself committed to the view that colonization is the outcome of the development of two perma nent and competing principles of sociation. Compelled to draw upon the resources both of the (...) dialectical tradition and of transcendental pragmat ics, the theory of communicative action is thereby constrained to remain both quasi-dialectical and quasi-transcendental. This founding gesture generates, in turn, at least two unavoidable aporias. The first can be under stood as a radical and structural deficit for critical judgement concerning the interplay among the decentered cognitive value spheres. The second is an inversion of the apparent claim of accessing a 'reason beyond reason' of which he accuses Horkheimer and Adorno. It shows up in the logical and epistemological problems surrounding the relation between performative contradiction and the status of his theory. Taken together, these theories signal that the theory of communicative action, rather than amounting to a transcendence of earlier approaches to reification, is simply a parallel, but one which becomes less than fully two-dimensional. Key Words: Adorno • .communicative action • .dialectic • .Habermas • . Horkheimer • . performative contradiction • . * reason • . reification. (shrink)