An Unbelievable Demo
Finding code in multiple places....Semi-related... I TA'ed a Comp Sci class a long time ago (back when they had to submit their code as print-outs).  I read through the print-outs and noticed that the "look" of one of them seemed oddly familiar (blocks, line lengths, indenting etc). I went back through the others and found another one that was almost exactly the same.Took it to the Prof and we agreed the ones that copied got 0 on the project, and the ones who allowed the copying got 50% of their mark.  Honestly, they got off quite easy.