[Angrist]

My driving instructor is a huge... loser I guess.

Last week I called him to ask him when my exam was. He said he didn't have the info right there, but that it was on a monday. He asked me to call back later. I did, but he never picked up. This morning he called me and said he knew my date. Great. Finally.
Now I check my mail and find an e-mail which says my instructor has just made the reservation. Which means that he lied before. He never knew. He couldn't tell, because he hadn't made the reservation yet.

Also, I failed my first test because there were things he never taught me. He doesn't keep a list of what he has taught each student... He just drives around, randomly teaching stuff.