The Asymmetry Thesis and the Diversity of "Invalid" Argument-Forms

Informal Logic 19 (1) (1999)

According to the Asymmetry Thesis, whereas there are many kinds of argument-forms that make at least some of their instances valid, there is none that makes any of its instances invalid. To refute this thesis, a counterexample has been produced in the form of an argument-form whose premise-form's instances are all logically true and whose conclusion form's instances are all logically false. The purpose of this paper is to show that there are many more kinds of argument-forms that make some of their instances invalid and that, hence, are counterexamples refuting the Asymmetry Thesis
Keywords asymmetry Thesis, Gerald J. Massey, argument-forms, invalidity, Hasty Generalization
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Can We Ever Pin One Down to a Formal Fallacy?Erik Cw Krabbe - 1996 - In J. F. A. K. van Benthem (ed.), Logic and Argumentation. North-Holland.
Propositional Relevance.George Bowles - 1990 - Informal Logic 12 (2).
Tom, Dick, and Harry, and All the King's Men.Gerald J. Massey - 1976 - American Philosophical Quarterly 13 (2):89 - 107.

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