Man, seems like half of life is just figuring out which rules actually matter.

Used to figure that crossed lines were just a thing the old guys joked about, like a diver legend or something. Then we had a near miss on a dam job where the tender patched in the wrong guy and told him to open a valve that wasn't his. Nobody got hurt but it scared the crap out of me. Now I always ask surface to confirm my name and dive number before I move an inch, every single time.

So when the guy in your class copied stuff for 3 weeks and passed the quiz faster, did he actually understand it or just get lucky on that one test? That feels like the real question here. Because if he bombed the next one, your friend's advice might be trash.