From QED and the men who made it: Schwinger, Feynman, Dyson and Tomonaga. p. 371: When Schwinger was at Harvard his numerous students... learned and disseminated his language. But as he became more isolated, fewer people understood and spoke the newer languages he created - for example, sourcery (Schwinger, 1970b, 1973) - contributing to his further isolation. Did Pratchett know of this?
