So here is a situation that happened to me. A professor of mine has taught the same class year after year, and builds his tests for this year from last year's,

So here is a situation that happened to me. A professor of mine has taught the same class year after year, and builds his tests for this year from last year's, changing only a few numbers. This professor also allows 1 8x11 "crib sheet" to be brought into the test, and distributes past years exams as study material. For the first exam, I studied honestly and filled my crib sheet with important formulas I didn't want to memorize. I got a decent grade, but nothing spectacular. However, for the second exam I realized that all the questions to the last test were from previous exams, and just printed out the previous years exams as my crib sheet. I got close to a perfect score on this second exam. Did I cheat? Once you start limiting the publicly available information student can use to study, the situation gets very sticky very quickly.