But that's just stupid. You find some code on stack overflow that solves your problem. Are you going to do the refactoring dance until it looks different enough

But that's just stupid. You find some code on stack overflow that solves your problem. Are you going to do the refactoring dance until it looks different enough or are you just going to use the code? You find the same code on a non open source github repo. Well what now? You've got a mental model of how to solve the problem. Can't use that knowledge? That knowledge has been locked away as illegal? This is not a reasonable model.