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College professors are going back to paper exams and handwritten essays to fight students using ChatGPT
(www.businessinsider.com)
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Of course people could do that, but you have to find someone willing to do it or be able to afford to pay for it. It happens but it's maybe 5% or students or less.
There is always going to be cheating. But once it becomes nearly impossible to detect, and maybe 30% or more people are doing it, the system breaks down.