'Maximum score. Two notes:
* This is generic; in abstract, a problem could be 3/5 points on one
randomization, and 5/7 on another
* In practice, this is a Very Bad Idea, and (a) will break some code
in place (although that code should get fixed), and (b) break some
analytics we plan to put in place.'

def max_score(self):

    return None
