Anthropic was sued successfully for training on books, the law still applies to them
https://www.npr.org/2025/09/05/g-s1-87367/anthropic-authors-...
When I write fizzbuzz do I owe royalties to the inventor of fizzbuzz? Is my brain copyright thieving because I can write out the song lyrics from memory?
I think if you write fizzbuzz and then sell it, without attribution, and it goes against the original fizzbuzz license, then you’re infringing.