My daughter graduated earlier this week and I did the proud father bit.  The ceremony was good - enough pomp but not too much, brisk enough to keep things moving but not rushing, and a nice musical interlude to freshen us up for further applause. As the lines of gowns edged their way forward and then marched across the platform to be gently biffed on the head with the ceremonial hat, I looked down the lists of graduates by subject.  I could hardly have asked for a more striking confirmation of one component of the Paula Principle thesis:  the increasingly superior educational performance of women.  In all but one subject,…