In Challenge and Response: Justification in Ethics, Carl Wellman coined 'conduction' and 'conductive' to name a distinctive kind of defeasible reasoning and argument-neither deductive nor inductive-often used in forming and justifying ethical judgments, classifications and judgments employing criteria. Some informal logicians have used the concept in their textbooks, but conductive reasoning and argument have hitherto received little scholarly attention. Conductive Argument is a comprehensive introduction to the theoretical issues related to conductive argument and reasoning. With papers by...