I enjoyed reading the Temptation of Christ article. One thing that struck me is that the Jesus character responded far more reasonably than your typical deluded person does when asked questions which challenge their beliefs, at least in my experience.

In my experience, when a person's beliefs are driven by emotion, he tends to have much more of a "concede nothing" mentality -- even if he is sane. Can Jesus in the story use this as evidence that he really is Jesus? Again we run into the problem that irrationality blinds the irrational to their own irrationality. But it's still worth considering I think.