ITT: stories of professors being brainlets

>be me
>lecture on theoretical CS
>dumbass professor only knows math and has no idea of how programming works
>he actually claims you cannot write a computer program that checks whether another computer program will halt

This was today. I went home and spent literally only 10 minutes in javascript to write such a program. Dumbass brainlet professor will be so embarrassed when I show him the code next week lol