how i'm handling my students using AI to write papers:
-don't accuse them on using AI from the get-go and instead ask them to informally define all the huge words that they used in their essay which i know they don't know the meaning of
-ask to see their original file where they "wrote" the essay. go to version history to see if it was just copy and pasted and then just edited a bit. i keep an eye out for the shit like "certainly! here's an essay about...."
-if they own up to it, they can re-do the assignment for a higher grade even if there will be an automatic penalty. if they don't, i process it like plagiarism and get my supervisor involved.
And this is much better than the immediate accusations. Some students have a good vocabulary. Stop accusing them of faking their essays without proof, and this is a good way to check.
Fellow students please stop using AI, go back to promising not to kill the school nerd if they do all your homework or something.