"Reading Wahrheit und Rechtfertigung (1999) and more specifically what Jürgen Habermas writes in the "Introduction" to his recent book, not yet published in English, I will try to explain his answer to the epistemological problem of realism: how can we conciliate both the postulate of a world that is independent of our descriptions, a single objective world, and the philosophy of language discovery according to which we have no direct access, non-mediated by language, to "naked" reality. Habermas wants to hold on to the moment of unconditionality that is part of the correspondence idea of truth, while retaining an internal relation between truth and justifiability: his aim is to work out a theory of truth that is inherently pragmatic yet retains the idea of an unconditional truth claim."
One World is Enough
Truth, Knowledge and Reality
Hilary Putnam on the Problem of Representation and "Internal" Realism.