Yeah, but what if they have a bag of chips, and inside that bag of chips, is a small tablet or phone, in which they ask chat gpt to give them the essay, and then they transcribe it? They might even eat some of those chips to obfuscate that they're getting the information from the bag.

At some level, there has to be some trust, or a system (e.g., in person proctored exams) would have to be used instead.