Occasional voice wrote:
Let me guess, he's quick to point this out.
The dumbest people I have known try their damnedest to convince others they are smart. It sounds like this is just the extreme example.
See if he noticeably tries to appear intelligent in conversation or show off what he knows without being prompted. If he does you have a full-blown shithead on your hands and you should avoid him at all costs.
The opposite is true as well. The smartest people I have known don't attempt to appear smart or intelligent in everyday conversation.
This resonates. My wife has worked with people for years (ten or more) and they never knew that she had a Ph.D. (Yale, no less.) It has nothing to do with her work in finance, so she'd never bring it up.
OTOH I've met people who've made it clear (within the first five minutes of our first conversation) that they have a doctorate, even though it be irrelevant to the conversation topic.
For me, it was always just a question of the next thing: A.B. in liberal arts, then DNFed a Ph.D. program in the same area; a few years of working and coaching, then an M.S. in phys ed (to be able to coach as a profession); a couple decades of coaching, then a J.D./M.B.A. to be able to take care of my family. Four degrees, but spread apart...really doesn't seem unusual to me. (Though if I'd had to pay tuition for any of them, I suspect my attitude would be different...)
I could easily see people accumulating a half-dozen degrees over time.