I'd have to agree. And honestly, even if the kid didn't admit to using AI, if they were using AI as a source and not citing it, then it was a failing paper regardless, as certainly one of the requirements was to cite sources.
If I was handling this, I'd treat it the same as if somebody just copy pasted some text off Google search and didn't cite. I'm not sure I'd give the student a 0. But it wouldn't be a good grade and I'd have to read the paper to see the extent to which Id agree it rises to the level of cheating.
Completely agree with you on all of it, but, to let you know, sometimes there are school-wide policies on plagiarism that teachers have to follow. My highschool made teachers give an automatic 0 for any plagiarism.
If I was handling this, I'd treat it the same as if somebody just copy pasted some text off Google search and didn't cite. I'm not sure I'd give the student a 0. But it wouldn't be a good grade and I'd have to read the paper to see the extent to which Id agree it rises to the level of cheating.