Invisible prompt trap catches 32 of 35 students cheating with AI
leephillips · hn · 2026-07-28
A professor used an invisible prompt trap to catch 32 of 35 students who were allegedly cheating with AI.
The post highlights a simple but telling detection technique: hiding instructions in the assignment text that a model would follow but a student should not see. It’s a sharp example of how AI misuse in education is evolving, and how instructors are starting to adapt.
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