De Morgan Quotes

“L'homme ne poursuit que des chimères. (Man follows only phantoms.)

{His true last words, according to Augustus De Morgan.}”
― Pierre-Simon Laplace

“De Morgan was explaining to an actuary what was the chance that a certain proportion of some group of people would at the end of a given time be alive; and quoted the actuarial formula, involving p [pi], which, in answer to a question, he explained stood for the ratio of the circumference of a circle to its diameter. His acquaintance, who had so far listened to the explanation with interest, interrupted him and exclaimed, 'My dear friend, that must be a delusion, what can a circle have to do with the number of people alive at a given time?”
― W.W. Rouse Ball, Mathematical Recreations and Essays