IIUC, the question at hand is: does training require a special, separate, license or can you legally acquire a work and then use it for training?
I.E. Anthropic can not pirate a bunch of books and then use those for training, but it can legally purchase the same books and then use those purchased books for training.
> does training require a special, separate, license or can you legally acquire a work and then use it for training?
No. But it's not about current precedence or legality because the legal framework for accurately (according to general moral and societal acceptance) is decades behind where it needs to be. The courts will decide over the next few years.