[Lerc]

Good point about facts. It applies similarly to properties that provide functionality. One tends to lose track of the fact that much of software shouldn't be copyrightable in the first place, it's just a pretence that has evolved due to how much people like money.

It's a stretch to say that training a model falls under that definition of derivative work. It's be like saying that building a house after reading a book on how to build a house makes the house a derivative work. I can just imagine cookbooks introducing limited licences on who you can feed with their recipes.