Informal Fallacies 1: Language, Relevance, Authority Invitation to Critical Thinking First Canadian Edition Joel Rudinow Vincent E. Barry Mark Letteri Chapter 11 Informal Fallacies 1: Language, Relevance, Authority www.criticalthinking1ce.nelson.com

© 2008 by Nelson, a division of Thomson Canada Limited Overview of Fallacies Fallacies of Language Fallacies of Relevance Fallacious Appeals to Authority © 2008 by Nelson, a division of Thomson Canada Limited

© 2008 by Nelson, a division of Thomson Canada Limited Fallacies of Language Problematic Ambiguity: Informal Fallacy of Problematic Equivocation Informal Fallacy of Amphibole Informal Fallacy of False Implication Informal Fallacy of Composition Informal Fallacy of Division © 2008 by Nelson, a division of Thomson Canada Limited

© 2008 by Nelson, a division of Thomson Canada Limited Fallacies of Language Problematic Vagueness: In argument In advertising: Puffery Hyperbole or hype Weasel words © 2008 by Nelson, a division of Thomson Canada Limited

© 2008 by Nelson, a division of Thomson Canada Limited Fallacies of Language Informal Fallacy of Classification: Denotation Informal Fallacy of Loaded Language: Connotation and the Informal Fallacy of Loaded Language Euphemism Dysphemism Informal Fallacy of Rhetorical Question © 2008 by Nelson, a division of Thomson Canada Limited

Fallacies of Relevance Ad Hominem : Informal Fallacy of Abusive ad hominem Informal Fallacy of Circumstantial ad hominem Informal Fallacy of Guilt by Association Informal Fallacy of Poisoning the Well Informal Fallacy of Genetic Appeal © 2008 by Nelson, a division of Thomson Canada Limited

Provincialism, Tradition, Popularity, Novelty, and Positioning Informal Fallacy of Provincialism Informal Fallacy of Appeal to Tradition Informal Fallacy of Appeal to Popularity Informal Fallacy of Appeal to Novelty Informal Fallacy of Guilt by Association Positioning © 2008 by Nelson, a division of Thomson Canada Limited

Fallacious Appeal to Emotion Informal Fallacy of Appeal to Anger Informal Fallacy of Appeal to Fear Informal Fallacy of Appeal to Pity © 2008 by Nelson, a division of Thomson Canada Limited

© 2008 by Nelson, a division of Thomson Canada Limited Diversionary Tactics Red Herring Straw Person Informal Fallacy of Two Wrongs Informal Fallacy of Common Practice © 2008 by Nelson, a division of Thomson Canada Limited

Fallacious Appeals to Authority Appeals to Invincible Authority Informal Fallacy of Appeal to Unidentified Authority Informal Fallacy of Appeal to Irrelevant Authority Informal Fallacy of Division of Expert Opinion Conflict of Interest © 2008 by Nelson, a division of Thomson Canada Limited