From July 24, 1910

IF YOU ARE BALD YOU’LL STAY BALD: That’s What a Tonsorial Artist Says and He Always Has His Reasons Therefor (PDF)

The logic here seems to be: If there were a cure for baldness, barbers would know about it. Barbers don’t know about it. Therefore there is no cure for baldness. Modus tollens.

But the real gem is this quote: “Some are born bald. Some achieve baldness. Some have baldness thrust upon them… The born bald usually get over it and live to get it again.” Sage words.