This line from a book on my Kindle that I take a gander at ever so often brought a smile to my face…
”The eminent linguistic philosopher J. L. Austin of Oxford once gave a lecture in which he asserted that there are many languages in which a double negative makes a positive but none in which a double positive makes a negative to which the Columbia philosopher Sidney Morgenbesser, sitting in the audience, sarcastically replied, ‘Yeah, yeah.'”
The Joy Of X, page 17
Steven H. Strogatz