That's jim in a nutshell. An expert on well just about everything - law, medicine, international relations, climate...but when pressed he'll run and hide. We refer to it as "self-banning". When cornered he will call you stupid and then disappear. Then reappear with a link YouTube link to obscure band or foreign movie. A transparent sleight of hand to take the heat off the fact he's clueless about the topic. It's sort of sad and pathetic if you think about it. The reality he's terribly unaccomplished and quite insecure about it.
So waiting for him to answer is a waste of your time. Go teach your dog Latin.