> The understanding was that the exams are sufficiently hard, that students smart enough to pass do not allow others to freeload... That sounds like a flawed a

> The understanding was that the exams are sufficiently hard, that students smart enough to pass do not allow others to freeload... That sounds like a flawed assumption to me. There are lots of social and economic incentives that might lead someone smart to do others' work. I tend to agree that working with others on problem sets can be quite beneficial. Many classes I took had the same policy on those. But at some point you have to prove you can do it yourself.