Reminds me of my college days in the dark ages. We were on an "honor system." Profs would pass out exams and leave. We had to write at the bottom, "I have neither given nor received aid on this exam nor have I seen anyone do so." Sometimes we could get away with "Pledge in full."
I never saw cheating--but I never looked for it, either.
Back then we were graded; an A was an A and there were no P's.