I have completed a draft of a new short discussion piece on Michael Blome-Tillmann's (2009) Mind paper, "Knowledge and Presuppositions". It is essentially a development of this blog post from a year and a half ago. (I'd forgotten about it, to be honest -- I rediscovered it as I finished drafting.)
My new paper: Ignorance and Presuppositions
I hope to submit it soon; any comments would be very welcome.