When I was at MIT, I had a course in fluid mechanics which, as you probably know can be a very difficult course. I am no fluid mechanics genious but I somehow got lucky on the midterm -- I got a 94. The next closest score was 65 and the class average was 31. So the prof thought I must have cheated. No cheating -- I just got lucky. But, alas, the fluid mechanics gods are fickle -- one day they smile on you and the next they smite you down. I ended the course with a B-.

I will make no claims to sainthood, but I have never cheated in school. I had another course in queuing theory (stochastic processes) and the professor gave a take home test that consisted of problems assigned from the text. I am a bit of a book nut and I happened to have a copy of the answer book to the text -- which stayed closed until I turned in the exam. I got a B- in the course.