[effigies]

> Penalizing both students is clearly wrong if one student did the assignment properly without cheating, and the other student copied the first student's work.

I had a professor who would actually give the person who did the work the worse grade, under the justification that you can never get rid of demand, but you could discourage supply. I thought it was a pretty clever solution. If I'd worked my ass off and somebody copying me got a 50% where I got a 0%, I'd be much more careful about what I shared.