"... women, children, and Geezers"

The author of Sex Differences in Mathematical Aptitude isn't going to get invited to be president of Harvard anytime soon. I was kind of liking him for that, until I read this line in his article, Assessing the Ashkenzic IQ:

a base population for this calculation is better characterized by the total population minus women, children and geezers

How are we supposed to take someone seriously who doesn't know to capitalize "Geezers"?