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

Authors

  • George Bowles

DOI:

https://doi.org/10.22329/il.v19i1.2316

Keywords:

asymmetry Thesis, Gerald J. Massey, argument-forms, invalidity, Hasty Generalization

Abstract

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.

Downloads

Published

1999-01-01

Issue

Vol. 19 No. 1 (1999)

Section

Articles

License

Copyright for each article published in Informal Logic belongs to its author(s). Informal Logic has the right of first publication. Permission to reprint any article that appears in Informal Logic MUST be obtained in writing from the author(s). In addition to any form of acknowledgement required by the author(s), the following notice must be added to the statement of copyright permission made in the reprint (with the appropriate numbers replacing the ellipses): [Article Title] was originally published in Informal Logic, [year], Volume ..., Number ..., pp. ...-... .