Professional Background

Lecturer, San Francisco State University, 1975-76.

Assistant to Full Professor, University of Nebraska at Omaha, 1976-89 (became a full professor in 1985 and Nebraska Foundation Professor of Philosophy in 1986).

Faculty Fellow at Stanford Humanities Center and Visiting Associate Professor of Philosophy, Stanford University, 1983-84.

Visiting Research Professor in Evolutionary Epistemology, University of Newcastle, Australia, 1986.

Visiting Research Professor, University of Newcastle, Australia, Summer, 1987.

Visiting Research Professor, Instituto de Filosofia, Consejo Superior de Investigaciones Cientificas, Madrid, Spain, Fall, 1987.

Visiting Research Professor, Universidad de Barcelona, Spain, Winter, 1988.

Visiting Research Professor, Universidad de Santiago de Compostela, Spain, Spring, 1988.

Fellow, Institute for Advanced Study in the Humanities, University of Edinburgh, Scotland, Summer 1989.

Visiting Professor, Kobe University of Commerce, Kobe, Japan, 1993.

Visiting Professor, University of Washington, Spring, 1994.

Professor, History and Philosophy of Science, The Evergreen State College, 1989-1997.

Visiting Research Professor, University of California, Irvine, 1997-1999.

Professor, Humanities, Lawrence Technological University, 1999 to present;  Department Chair, 1999 - 2004.