ThIStudy 1099 Views September 09, 2015, 07:36:00 PM Question Solved Share Tweet One motivation for Aristotle's notion of substance is the problem of: a. Identity over time. b. Metaphysical observation. c. Skepticism. d. Scientific method. e. Our knowledge of the external world. Gabriel September 09, 2015, 07:40:30 PM #1 Answer a Hosea September 09, 2015, 07:54:28 PM #2 You are a life saver.