Given human nature, there is no way to prevent cheating. Those who have personal integrity and a sense of self worth would never cheat. Those who are normal ambitious unscrupulous types will always cheat, no matter the systems in place to prevent cheating.
Links
[1] https://paw.princeton.edu/node/add/inbox?field_in_response_to=180881
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[4] https://paw.princeton.edu/print/180881
[5] https://paw.princeton.edu/printmail/180881
[6] https://paw.princeton.edu/article/honor-code-conflict
