I don't need to re-read your post.
You, literally, wrote "...It’s a bit of a myth he’s highly educated...". I questioned how you reached this conclusion if he left the course YOU were on 15 years ago. I asked you if your assumption was if his education stopped dead. I also asked if you had any evidence of his current intellect and you have waffled on about something else.
Maybe, from an educational standpoint, yours stopped around 15 years ago to Nedum, cos that's the last time he knew you were on a course?
Would he assume you weren't "highly educated" from that reasoning when he wouldn't know what you did after that?
Stupid logic, isn't it?