Yeah, that's a good way of putting it. I agree there is no hard line. I would put it somewhere between #3 and #5. On the other hand, there are plenty of lega

Yeah, that's a good way of putting it. I agree there is no hard line. I would put it somewhere between #3 and #5. On the other hand, there are plenty of legal/licensing issues that rely on fine distinctions. Just in the domain of software: is it OK to copy 1 line of code, 10 lines of code, or 100 lines of code? What about if you transliterate the code to a different language? It's possible that the fuzzy distinctions are OK and they still roughly preserve the intent and business model.