Ronald J. Brachman is Head of the Artificial Intelligence Principles Research Department at AT&T Bell Laboratories.
Hector J. Levesque is Professor Emeritus in the Department of Computer Science at the University of Toronto. He is the author of C
ommon Sense, the Turing Test, and the Quest for Real AI, coauthor (with Gerhard Lakemeyer) of
The Logic of Knowledge Bases, and coeditor (with Ronald J. Brachman) of
Knowledge Representation and Reasoning, all three published by the MIT Press.
Raymond Reiter is Professor and Co-Director of the Cognitive Robotics Project in the Department of Computer Science at the University of Toronto.