Distinguished Professor Emeritus, University of Waterloo

Professor Computer Science Emeritus, University of Toronto

Professor of University of Brazil and Researcher CNPq

School of Philosophical and Historical Inquiry, University of Sydney

Professor Emeritus, Dept of Philosophy, University of Alberta

Paderborn University

Adjunct Professor of Philosophy, School of Humanities, Sydney University

Associate Professor, Roma Tre University, Rome

Professor of Philosophy, Bishop's University

University of Alberta