[New Entry by Sten Ebbesen on September 7, 2020.] Boethius of Dacia was a leading philosopher at the faculty of arts in Paris about 1270 - 1275. He developed the Aristotelian idea of the autonomy of each domain of knowledge in a way that could justify Aristotelian-style natural science and ethics in spite of disagreements with revealed truth. He also made a major contribution to the linguistic theory now known as modism....