I may be wrong but in my opinion this is not technically possible. They can say a text is not AI written with more confidence, but it should be absolutely impos

I may be wrong but in my opinion this is not technically possible. They can say a text is not AI written with more confidence, but it should be absolutely impossible to say a text is 100% AI written. There is nothing that stops a human to write something AI also wrote. It could be less probable, it could be not common, but there is no way to be 100% sure a human did not write something. Unless they can provide logs and attach an output to a user/session, they are just saying "This is something that could have been a Claude output", but that's all. Even in their confidence it could be wrong. It reminds me of signature authenticators. They are just saying "Yeah this is something this author/celeb could have signed", or "This is something the celeb def did not sign", but they can't be never 100% sure.