<p>Beliavsky, in any human endeavor, there will be people who are “qualified” to study it but who will not do as well as they had hoped. It’s like you envision some world where people magically have it stamped on their forehead that they WILL get a 5 on the AP test before they sign up for the course. Anyway, if everyone got a 4 or 5, you’d probably change the goalposts and claim that the test was too easy and wasn’t adequately distinguishing the stand-out students from the merely good students.</p>