Book excerpt: Rhetoric and Incommensurability examines the complex relationships among rhetoric, philosophy, and science as they converge on the question of incommensurability, the notion jointly (though not collaboratively) introduced to science studies in 1962 by Thomas Kuhn and Paul Feyerabend. The incommensurability thesis represents the most profound problem facing argumentation and dialogue—in science, surely, but in any symbolic encounter, any attempt to cooperate, find common ground, get along, make better knowledge, and build better societies. This volume brings rhetoric, the chief discipline that studies argumentation and dialogue, to bear on that problem, finding it much more tractable than have most philosophical accounts.