ai is indeed a problem but you are an alarmist when i was in the middle and high school, the poor performing students would always cheat and look on the internet for leaked answers for all school books, eventually getting perfect answers with zero understanding (i'm not sure if this is a thing in germany). this problem existed already when the early internet was still out there.that is why teachers always looked at how the student solved the task first and at the answer last. and yes, as you probably guessed, this shit was like 15 years ago and more
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