i Goal-Directedness, Behavior and Evolution: A Philosophical Investigation By MICHAEL TRESTMAN B.A. Washington University 2003 M.A. University of California, Davis 2007 DISSERTATION Submitted in partial satisfaction of the requirements for the degree of DOCTOR OF PHILOSOPHY in Philosophy in the OFFICE OF GRADUATE STUDIES of the UNIVERSITY OF CALIFORNIA DAVIS Approved: _____________________ James Griesemer, Chair ______________________ ______________________ Paul Teller Roberta Millstein ______________________ ______________________ Bernard Molyneux William Bechtel Committee in Charge 2010