Alan G. Gross is a professor of rhetoric at the University of Minnesota-Twin Cities. He is the author of "The Rhetoric of Science "and "Starring the Text: The Place of Rhetoric in Science Studies. "He is co-editor of "Rhetorical Hermeneutics: Invention and Interpretation in the Age of Science "and "The Scientific Literature: A Guided Tour." Arthur E. Walzer is a professor in writing studies at the University of Minnesota. He is the author of "George Campbell: Rhetoric in the Age of Enlightenment" and co-editor of "The Viability of the Rhetorical Tradition,"