Luis Xavier Lopez - Farjeat is Professor of Philosophy at the Universidad Panamericana, Mexico City. He is coeditor of The Routledge Companion to Islamic Philosophy (forthcoming) and has published several articles on Classical Arabic Philosophy. Jörg Alejandro Teflkamp teaches Philosophy at the Autonomous Metropolitan University, Mexico City. He has published Sinne, Gegenstânde und Sensibilia. Zur Wahrnehmungstheorie des Thomas von Aquin (Leiden 1999) and several articles on Albert the Great and Thomas Aquinas.