(“Thorough examination” as a term is too long though — let’s just call them “thors”.)
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In seriousness the above only really applies at University level, where you have adults who are there with the intention to learn and then receive a final certification that they did indeed learn. Who cares if some of them cheat on their homework? They’ll fail their finals and more fool them.
With children though, there’s a much bigger responsibility on teachers to raise them as moral beings who will achieve their full potential. I can see why high schools get very anxious about raising kids to be something other than prompt engineers.