US universities from Yale to Cornell are moving away from AI detection software even as AI cheating grows. We look at a professor’s hidden-prompt trap that caught 60 of 350 students, the false-positive arithmetic, what a 1,057-faculty survey says, how assessment is being redesigned, and the lessons for UK employers.
When an X account used Pangram to accuse Canadian-Haitian novelist Thelyson Orelien of writing his Goncourt-listed debut with AI, newsrooms ran the book through a dozen AI detectors and got every possible answer. This article sets out what each test found, how the tools work, what independent benchmarks from Chicago, Brussels and the Authors Guild show, the arithmetic of false positives, and how to use AI detectors without wronging anyone.
Can you teach yourself to detect AI writing? The honest answer is maybe. There is no single giveaway — only accumulating habits: signature vocabulary such as delve, meticulous and quietly, the “not X, but Y” frame, the rule of three, claim escalation and length that ignores the situation. The evidence is more encouraging than the old consensus: annotators who use these systems daily reached 86.7% to 96.7% true-positive rates individually and 99.3% as a majority vote across 300 articles, beating every automated detector except Pangram, while occasional users managed 56.7% — barely above chance. This breakdown covers the tells that hold up, the human-versus-detector numbers, the Stanford finding that seven detectors falsely flagged 61% of essays by non-native English writers, why the tells keep expiring, and what to do instead if you commission content.
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