According to the article, Neurath's reflexive epistemology—expressed by the metaphor of the ship in need of reconstruction on the open sea—represents a philosophical alternative to the classical and contemporary forms of scientific realism and ethical cognitivism, including Popper's falsificationism. Against Quine's reductive interpretation of Neurath's boat argument as the basis for a 'naturalized epistemology,' the article maintains that the metaphor suggests the idea of an insuperable situation of linguistic and conceptual circularity. This prevents any attempt at self-foundation in scientific knowledge, (...) as well as in ethics and politics, and rules out any 'constructive philosophy' aiming to break circularity in pursuit of some methodological beginning. (shrink)