Which issue are you talking about? Is there already a comments thread about it on Eliezer's post?

Found it. It was nested too deep in a comment tree.

The particular line was:

I would ask him what he knows now, in advance, that all those sane intelligent people will miss. I don't see how you could (well-justifiedly) access that epistemic state.

The position is something I think it is best I don't mention again until (unless) I get around to writing the post "Predicting Failure Without Details" to express the position clearly with references and what limits apply to that kind of reasoning.