Your comment is a bit dismissive, but you’re right. That’s what will happen. Another reply says “ Wouldn't the grade level be defined by the median student?”, w

Your comment is a bit dismissive, but you’re right. That’s what will happen. Another reply says “ Wouldn't the grade level be defined by the median student?”, which is exactly how you get ever lowering standards. You start with a few good sounding assumptions, and then keep adjusting the level, because the assumptions cannot, no, may not be wrong. Financial incentives are another good example.