Abstract

Giles of Rome analyzed the question of the division and definition of philosophy three times at the beginning of his philosophical career. He devoted to this subject the prologues of two of his Aristotle commentaries, CommentaryonthePhysics and CommentaryontheSophisticalRefutations. 1 He then devoted a work exclusively to this subject, Departibusphilosophiaeessentialibus. 2 Because of its clear, systematic approach, this text will be the main object of my analysis. I shall, however, discuss material from the two prologues that demonstrates either the evolution of Giles’s thought from the two prologues to Departibus or the changes, corrections, or additions he introduced into the theory of science and philosophy formulated in Departibus