Arguments vs. Discussions, II

A few years ago I was giving a lecture on dinosaurs. When I explained why I don't believe that God planted the fossils, one person started to strenuously argue. I noticed that he wore a jacket, hat tilted back, no tie, and a beard that had never been shaved.
"You're Chabad, right?" I asked.
Yes, he replied.
"So you're arguing this position because it was the Rebbe's position, right?" I asked.
Yes, he replied.
"Is there any circumstance under which you would say that the Rebbe was wrong?" I asked.
No, of course not, he said.
"So there's absolutely no point in having this argument!" I pointed out.