You passed because the teacher thought that you should have passed. So, you must have done something right. Relax, Stop over-analyzing things. There are more important things in life that to constantly thinking about the idea of why you should've passed the test that you ended up passing. This really seems like you have too much time on your hands to take up time thinking about this stuff. I was so bothered by such a waste of time that I have just wasted 2 minutes of my time writing this reply. Please, go and enjoy the fact that you passed the test, or just for kicks, go to the professor and tell him that you feel that you shouldn't have passed that exam and that you want a harded on just to make sure you earn the passing grade. There it is, now i wasted 3 minutes of my time. That's 3 minutes that i will never get back. People, have you ever posted a reply on SDN that you *shouldn't* have?