Arguing from Definition to Verbal Classification: The Case of Redefining 'Planet' to Exclude Pluto

Informal Logic 28 (2):129-154 (2008)
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Abstract

The recent redefinition of 'planet' that excludes Pluto as a planet led to controversy that provides a case study of how competing scientific definitions can be supported by characteristic types of evidence. An argumentation scheme from Hastings is used to analyze argument from verbal classification as a form of inference used in rational argumentation. The Toulmin-style format is compared to more recently developed ways of modeling such cases that stem from advances in argumentation technology in artificial intelligence. Using these tools, it is shown how argumentation schemes, in particular argument from verbal classification and argument from definition to verbal classification, apply to cases of scientific argumentation

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Author's Profile

Douglas Walton
Last affiliation: University of Windsor

References found in this work

The concept of law.Hla Hart - 1961 - New York: Oxford University Press.
The Concept of Law.Hla Hart - 1961 - Oxford, United Kingdom: Oxford University Press UK.
Argumentation schemes for presumptive reasoning.Douglas N. Walton - 1996 - Mahwah, N.J.: L. Erlbaum Associates.
The Uses of Argument.Stephen E. Toulmin - 1958 - Philosophy 34 (130):244-245.
The Uses of Argument.Frederick L. Will & Stephen Toulmin - 1960 - Philosophical Review 69 (3):399.

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