Do you really think anyone is ready to spend money on legal to prove that some piece of code is public domain/has no author? That’s an expensive bet with uncert

Do you really think anyone is ready to spend money on legal to prove that some piece of code is public domain/has no author? That’s an expensive bet with uncertain outcome. And of course you can recover some information only if logs exist, which might not be the case, especially if local inference was used.