did Churchill coin that over-30 maxim?

Conservatives love to cite Winston Churchill for the saying [via Prof. Bainbridge]: Any man who is under 30, and is not a liberal, has no heart; and any man who is over 30, and is not a conservative, has no brains.  It seems fairly clear, however, that the attribution is as erroneous as the sentiment. … Continue reading did Churchill coin that over-30 maxim?