Now I'm one of those weirdos who is actually a bit sympathetic to the KK principle. So I'm interested in his argument. I find it pretty uncompelling. DeRose writes:
Both equations of standards -- (1) those for properly asserting that p with those for properly asserting that one knows that p, and (2) those for properly asserting that one knows that p with those for actually knowing that p -- are mistaken, as I trust the considerations below will show to anyone who has deliberated over close calls about whether one is positioned well enough to claim to know that p or should cool one's heels and only assert that p. (The Case for Contextualism, 103.)
I won't continue with his argument, because I'm already not on board. I'm pretty sure I've never deliberated over a close call about whether I was in a good enough situation to assert that I know p, or whether I should cool my heels and only assert that p. Indeed, that strikes me as a totally bizarre thing to do. DeRose himself says that to assert that p is, in some sense, to represent oneself as knowing p.
I know that there are strong theoretical reasons for denying KK, and for accepting the knowledge norm of assertion, and I see that those two verdicts together predict that there will be cases like these in which one can assert p but not that one knows p. But to take such cases as a clear starting point strikes me as bizarre; this, to me, is a cost that I'll accept if I'm forced to. But it's by no means obvious that this ever happens. "p but I don't know whether I know p" is not good.
Am I off base here? Do you ever consider whether Kp is warrantedly assertable, or whether to just stick with the safer p? I don't. (I know I don't.)