Nick:

Reg disagreement between Robin and Eliezer on singularity: They've discussed this many times, both here and on other mailinglists. But the discussion always seems to end prematurely. I think this would make for a great disagreement case study--topic is important, both are disagreement savvy, both know and respect one another, both have some subject matter expertise... I would like them to try once to get to the bottom of the issue, and continue discussion until they either cease disagreeing or at least agree exactly on what they disagree about, and why, and on how each person justifies the persistent disagreement.

I think that's the general idea, but I want to do as much foundational blogging in advance before that point that I can refer back to - otherwise it's duplicated effort, or hurried half-arguments.