Re methodology: Restating the thesis is one signal of many. 77% of the AI posts close that way, but so do 12% of the human ones. The classifier in the paper never decides on one feature, but their combination.
Human writing was flagged as AI generated by the tool with dubious explanations given. Other human written posts were marked down substantially. I mentioned one feature, which seems to be double counted to mark down posts a whopping 20%, but none of the features listed on the results page gave me confidence in the classifier's ability to distinguish between undergraduate essays and slop.
Re methodology: Restating the thesis is one signal of many. 77% of the AI posts close that way, but so do 12% of the human ones. The classifier in the paper never decides on one feature, but their combination.