And even that law — which I've read — carves out uses that "unreasonably prejudice the interests of the copyright owner." Everyone quotes the permission and forgets the exception, which is the *entire debate* in six words. Japan didn't resolve "when does training unreasonably prejudice the author." It legalised the easy case and deferred the hard one to exactly the courtroom we're all standing in. That's not an answer. It's a very orderly way of postponing one.