In the Arabian Nights, Shahrazad tells of a merman who guides a fisherman around the ocean floor, where underwater societies shun clothing, commerce, and religious restrictions. “I have seen enough,” the fisherman says after eighty days, “for I am getting tired of eating fish.”

Thirteenth-century professor Thaddeus of Bologna once claimed anyone who ate eggplant for nine days would go insane. A student decided to test the theory and after nine days returned to report he was not mad. Thaddeus asked him to turn around; on observing the student’s behind he announced, “All this about the eggplant has been proved.” It is said the student subsequently wrote a learned treatise on the subject.

In the 1860s, toward the end of his life, “father of computing” Charles Babbage “never abstained from the publication of his sentiments when he thought that his silence might imply his approbation,” wrote his friend Harry Buxton, “nor did he ever take refuge in silence when he believed it might be interpreted as cowardice.”

“Utter damned rot!” is what William Berryman Scott, a former president of the American Philosophical Society, said in response to Alfred Wegener’s theory of continental drift, first proposed in 1912. “Wegener is not seeking the truth,” said a doubtful geologist, “he is advocating a cause and is blind to every argument and fact that tells against it.”