Earlier quoted context omitted.
You can't prove something is/isn't created with AI. Also, if AI generated content cannot be copyrighted, they can't infringe copyright as well
Of the three claims you just made, two are clearly false and the third is probably also... You can prove something is created by AI by e.g. showing the transcripts, especially from the vendor side. You cannot prove that something isn't created with AI, at least not if you require incontrovertible proof (outside of, like, working in some kind of verifiably AI-free clean room, or doing something that current models are…
I assume the idea is that the fault/blame lies with the human(s) that caused the AI to generate something that violates copyright. Going back to previous comments, the typewriter that generated a document didn't infringe copyright - the person using it did.