 Woods and Walton 1982 and Hansen and Pinto 1995 contain detailed discussions of the definition, analysis and assessment of fallacies. In argumentation theory, van Eemeren and Grootendorst 1992 propose a “pragma-dialectical” account of fallacies which treats them as violations of rules that govern critical discussion -- dialogues that attempt to resolve a difference of opinion. Battersby and Bailin 2011 view fallacies as patterns of argument patterns “whose persuasive power greatly exceeds its probative [i.e. evidential] value,” making fallacies errors in reasoning that ordinary arguers are attracted to in view of their rhetorical appeal. 