logy of Testimony, Portsmouth, England (Keynote) University of Portsmouth, England 1998 Commencement University of Bristol, Bristol, England 2nd World Skeptics Congress, University of Heidelberg, Germany (Keynote address) Paul McReynold's Lecturer, Univ. of Nevada, Reno Conference "Embracing Science in an Irrati

omputer Society, 1995 R.W. Wood Prize, Optical Society of America, 2001 Benjamin Franklin Medal, Franklin Institute, 2001 In Praise of Reason Award, World Skeptics Congress, 2002 SOCIETIES President, American Association for Artificial Intelligence, 1981-82 Fellow, American Academy of Arts and Sciences Fellow, Instit