Hoist with his own petard

I will studiously not comment on this, much as I would like to: I have just drawn it from the archives to use in the current book.

"Bischoff, one of the leading anatomists of Europe, thrived some 70 years ago. He carefully measured brain weights, and after many years' accumulation of much data he observed that the average weight of a man's brain was 1350 grams, that of a woman only 1250 grams. This at once, he argued, was infallible proof of the mental superiority of men over women. Throughout his life, he defended this hypothesis with the conviction of a zealot. Being the true scientist, he specified in his will that his own brain be added to his impressive collection. The postmortem examination elicited the interesting fact that his own brain weighed only 1245 grams."

—Scientific American, March 1992, 8, quoting from an unidentified source in Scientific American, March 1942.