A man laid down with a wound to the head. The doctor claimed he was already dead. "It's really not so bad. This one time I had two swords in my brain," the optimist said.
The Optimist [Limerick]
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The astronomer Francesco Sizzi worked himself into a tizzy: "More rocks in space? There're seven holes in a face! Pssh! Galileo calls himself scientist, but is he?"
Note: When Galileo suggested Jupiter had moons, Sizzi summarily rejected the idea based on the “rationale” that there couldn’t be more than seven natural satellites because there are seven holes in a mammal’s head, seven days in a week, and [somehow] seven metals… ergo, seven astronomical bodies, maximum.