The Ernest Nagel Lecture
in Philosophy & Science

will be presented by
Bas van Fraassen
professor of philosophy at Princeton University

The Visible and Invisible World
Tuesday, 19 February

Weyl's Paradox and Carnap's Lost World
Wednesday, 20 February

Structural Realism and the Phenomena
Thursday, 21 February

4:30 pm, Margaret Morrison Carnegie Hall A14, Carnegie Mellon University

The Ernest Nagel Lectures are jointly sponsored by
the Department of Philosophy at Carnegie Mellon University
and the Center for Philosophy of Science at the University of Pittsburgh.

The first and third lectures are intended for a general audience;
the second will be of interest mainly to philosophers.