1. John P. Jackson, Jr., Department of Communication, University of Colorado at Boulder . A version of this paper was presented at the NCA/AFA Summer Conference on Argumentation, Alta, UT, August, 2005.1 would like to acknowledge the comments and criticisms of those panelists, the participants in the University of Colorado's Rhetoric Workshop, Lisa Keränen, Randall Lake, and the anonymous referees. I also would like to thank Nona Olivia for her expert proofreading.