620
Professor's invisible prompt trap catches 32 students cheating on their midterm with AI
(www.techspot.com)
this post was submitted on 27 Jul 2026
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What don't get is how they didn't see the "invisible" text when they were copying it to paste it into the AI. Any tool I've ever used to select and copy text highlights it in a way that would show the "invisible" part. Was the question just so long that they could easily miss it?
I love the story but I'm a little skeptical just because of this one detail.
Probably they did ctrl+a or just dragged the mouse all the way down without looking
There's a video in the article that shows it. He put the prompt at the end of a bullet point, but still in the middle of the block of text. Very easy to miss if you're selecting all.