Quantum Mechanics, Mathematics, Cognition and Action Proposals for a Formalized Epistemology Edited by Mioara Mugur-Sch¨ achter Centre pour la Synth` ese d’une ´ Epistemologie Formalis´ ee Paris, France and Alwyn van der Merwe University of Denver Denver, Colorado, U.S.A. KLUWER ACADEMIC PUBLISHERS DORDRECHT/BOSTON/LONDON