You'd be surprised at the variation present in complex assignments implemented by non-expert students. It turns out that doing things in buggy and randomly wron

You'd be surprised at the variation present in complex assignments implemented by non-expert students. It turns out that doing things in buggy and randomly wrong or nonstandard ways leads to things looking more unique than they would if you had a group of experts implement them. "Having the same bugs" is one of the easier ways to confirm cheating, at that. (I'm a CS professor.)