By you, I mean plural you. Like a prof has a class of people to ensure they grasp the fundamental underlying concept, not just running through the paces. For a personal example, I had a Descriptive Geometey course in college. Early stuff is easy, later techniques for finding shortest distance between two topologies in 3d space based of 2 flat images are complex. I was working 50 hours a week and just had a kid, so my level of focus on this course was too low. For the exam I did not know all the mulitprojection methods well enough to solve them, so I just used my ability to imagine the spatial shape, and sketched them down. Turned out my guesses were good and got highest mark. Prof gave me kudos in front of class on how well i had completed it. But in fact I really had no clue hoe to solve the complex topologies properly. Had he asked for the staging projecrtions to be turned in I would have failed the course. This is what I meant by getting the right answers doean't test that "you" know the underlying concepts.