I agree that the fair use argument on training data is a genie that’s not getting put back in a bottle. But:

> If it isn't fair use, then we may need to sue all teachers for spitting out knowledge they ultimately acquired from someone's work.

Is such a lazy argument and always was. A human doing something is necessarily different than a machine doing it. We can be ok with a human doing a thing and simultaneously not ok with a machine doing it.