But isn't it similarly impossible to prove that the AI used an exact copy from a specific project that didn't have a permissive license? I get it that lifting

But isn't it similarly impossible to prove that the AI used an exact copy from a specific project that didn't have a permissive license? I get it that lifting a full-ass function as-is from a project is bad, but if you construct a function that does the same thing by aggregating bits from different projects - what then? There HAS to be moral and legal issues there, but what and where? Stealing other people's code is bad, but we do also have to admit that the vast majority of code in the world isn't doing anything groundbreaking that deserves a copyright. Or is it illegal to write a Hello World application after the first ever in that language was written and published, doesn't the copyright for that code exist on the first creator - and everyone else is in breach of their copyright or has to prove they had no prior knowledge of the code? (You can replace "hello world" with any trivial piece of code everyone writes a zillion times routinely). This whole thing is so wishy-washy and vague it's giving me migraines. I don't WANT to break any laws, but holy crap it's not easy to figure out where the actual limits are.