@futurebird I had an algebra teacher who was fond of saying "I know geometry, trigonometry, algebra, and calculus, which makes me a polymath." (I still find his pun hilarious. : ) To be fair, he also knew Greek , and a lot about the history of science and math in Europe and the Mediterranean, and when he talked about those topics, he would causally draw an accurate map of the region, with time-appropriate labels and borders, as if drawing accurate maps from memory on a chalkboard was no big deal