Informal Logic 26 (1):25-40 (2006)

We argue that Cohen’s concept of inductive or ampliative probability facilitates proper explication of sufficient strength for non-demonstrative arguments conforming to the Toulmin model. The data and claims of such arguments are singular statements. We may epistemically classify the warrants of such arguments as empirical (either physical or personal), institutional, or evaluative. Backing evidence and rebutting considerations vary with the epistemic type of warrant, but in each case the notion of ampliative probability for arguments with warrants of that type can be characterized. We may then use ampliative probability to define sufficient strength and related notions for Toulmin arguments
Keywords L.J. Cohen, Toulmin model, ampliative probability, inductive support, inductive probability, warrant, backing, rebuttal, canonical test
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References found in this work BETA

Speech Acts: An Essay in the Philosophy of Language.John Rogers Searle - 1969 - Cambridge, England: Cambridge University Press.
Warrant and Proper Function.Alvin Plantinga - 1993 - Oxford University Press.
Speech Acts: An Essay in the Philosophy of Language.William P. Alston - 1970 - Philosophical Quarterly 20 (79):172-179.
The New Rhetoric: A Treatise on Argumentation.Chaïm Perelman & Lucie Olbrechts-Tyteca - 1969 - Notre Dame, IN, USA: Notre Dame University Press.
The New Rhetoric: A Treatise on Argumentation.Chaïm Perelman - 1969 - Notre Dame, [Ind.]University of Notre Dame Press.

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Metaphors and Argumentation.Cristian Santibanez Yanez - 2007 - Proceedings of the Ontario Society for the Study of Argumentation Biennial Conference 7.

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