I work at a help desk on a college campus so I'm surrounded by extremely intelligent dumbasses. The most common problem we get are people who get incorrect second or third hand information and refuse to believe that we could possibly know better than the friend of their roommate who told them about this one thing they are asking about. There have been times where people have left our office convinced that they are somehow going to find a fourth floor office on a building we've repeatedly said is only two stories tall.
Probably the best came late one semester around the time of finals. Kids ask us where their finals happen all the time. We never know but we can usually put them in touch with someone who will like their professor or a TA. This guy came in with that very question, and the further we dug the more evident it became that this guy wasn't much of a thinker. He could not tell us the name of the course, name of the professor, it's time or place. The best he could give us was, "It's an economics course, I think."
We gave him the phone number for the Econ. department, waited until he left, and laughed until we hurt. Something tells me that if your attendance was so spotty you don't remember when or where the class was, you're probably not going to do to well on that final.