[mountaineer]

he was a professor of constitutional law.

That doesn't make him a constitutional scholar. Any law school graduate, including me, might be hired to teach a course in constitutional law, but a true scholar has published on the subject, argued before appellate courts, etc. Blubba did none of that. When I was in law school, my trusts and estates professor had absolutely no experience in the field. She was a Boalt Hall grad with an interest in leftwing social issues (of course) and knew absolutely nothing about the subject she was hired to teach. My impression is that x42 was a similarly ill-equipped law school prof.

[Piranha]

I wouldn't expect a school as good as Boalt Hall to hire someone unqualified to teach a basic course like t&e.

In my mind, a professor of a subject at a law school (as opposed to a teaching assistant) qualifies as a scholar of that subject. I admit that I don't have an authorotative definition to cite. If you (or any other readers) have an accepted definition of when a professor of a subject qualifies as a scholar in that subject I would be interested to read it.