@paulox @webology this sounds to me a bit like saying you'll only accept hand-written assignments in school because if it's been printed from a computer it might just be copy-pasted from Wikipedia.
Not that I like the "co-authored" thing either, as Paolo said, it's misleading at best (but that's marketing more than a disclaimer)
It all probably depends a lot how the human uses the LLM in the first place... But nuance is hard on the internet...