If humans understand this then presumably lawyers would start hunting for code replication caused by Copilot--using automated mechanisms similar to those used by professors at Universities to catch people cheating--and do the moral equivalent of ambulance chasing: offering to file all the paperwork on spec for a cut of an assured payout. But if people in general believe this to be fair use somehow, then GPL is essentially dead (I have been a big advocate for it over the years, and if people are doing this--and everyone thinks it is OK--then it loses the entire point as far as I am concerned).