where the presence of Grosseteste and Bacon was still palpable, he had a different view on the relationship between reason and faith as that of Thomas Aquinas. For Duns Scotus, the truths of faith could not be comprehended through the use of reason. Philosophy, hence, should not be a servant to theology, but act independently. He was the mentor of one of the greatest names of philosophy in the Middle Ages: William of Ockham. Late Middle Ages Theodore Metochites (1270–1332) was a Byzantine author and philosopher. His extant works comprises 20 Poems in dactylic hexameter, 18 orations (Logoi), Commentaries on Aristotle's writings on natural philosophy, an introduction to the study of Ptolemaic astronomy (Stoicheiosis astronomike), and 120 essays on various subjects, the Semeioseis gnomikai. Mondino de Liuzzi (c. 1270-1326) was an Italian physician, surgeon, and anatomist from Bologna who was one of the first in Medieval Europe to advocate for the public dissection of cadavers for advancing the field of anatomy. Greek and Roman taboos had meant that dissection was usually banned in ancient times, but Mondino de Liuzzi produced the first known anatomy textbook based on human dissection. Manuel Bryennios (ca. 1275–1340) was a Byzantine scholar who flourished in Constantinople about 1300 teaching astronomy, mathematics and musical theory. His only surviving work is the Harmonika (Greek: Ἁρμονικά), which is a three-volume codification of Byzantine musical scholarship based on the classical Greek works of Ptolemy, Nicomachus, and the Neopythagorean authors on the numerological theory of music. William of Ockham (1285–1350), Doctor Invincibilis, was an English Franciscan friar, philosopher, logician and theologian. Ockham defended the principle of parsimony, which could already be seen in the works of his mentor Duns Scotus. His principle later became known as Occam's Razor and states that if there are various equally valid explanations for a fact, then the simplest one should be chosen. This became a foundation of what would come to be known as the scientific method and one of the pillars of reductionism in science. Ockham probably died of the Black Plague. Jean Buridan and Nicole Oresme were his followers. Jacopo Dondi dell'Orologio (1290-1359) was an Italian doctor, clockmaker, and astronomer from Padua who wrote on a number of scientific subjects such as pharmacology, surgery, astrology, and natural sciences. He also designed an astronomical clock. Richard of Wallingford (1292-1336), an English abbot, mathematician, astronomer, and horologist who designed an astronomical clock as well