Keith DeRose has argued that ‘the knowledge account of assertion – according to which what one is in a position to assert is what one knows – ... provides a ... powerful positive argument in favor of contextualism’ (2009: 80). The truth is that it yields a powerful argument against contextualism, at least against its most popular, anti-sceptical versions. The following argument shows that, if we conjoin (such versions of) epistemic contextualism with an appropriate meta-linguistic formulation of the knowledge account (...) of assertion, contextualism cannot coherently be stated. (shrink)