The point is, excepting current legal standards which are already very murky, how can _you_ claim copyright, if you don't _know_ it isn't encumbered?

You can get these LLMs to generate copyrighted outputs both intentionally and accidentally. This is a known fact; therefore, if you're not checking the output to see if this has occurred then you're potentially generating legal risks for yourself and anyone who uses your code.

To not only ignore this for your own use case but to then release the code under a proclaimed license seems legally problematic if not ethically concerning.

If you did get sued for infringement I can't imagine that your defense would be that you find the argument tiresome? Honestly, do you think this would never happen, or how would you go about defending your actions here?

What do you mean by "checking the output"? Is there some kind of check the author says he didn't do that you think he should have? Or is your claim that using an LLM for coding is always copyright infringement? If so, I think the risk that I'll personally be the test case that resolves whatever ambiguities exist in the law is basically zero, and I don't think derailing the thread to be about that topic enlightens anyone.