On Priest on Nonmonotonic and Inductive Logic

Thought: A Journal of Philosophy 5 (2):119-124 (2016)

Authors
Greg Restall
University of Melbourne
Abstract
Graham Priest defends the use of a nonmonotonic logic, LPm, in his analysis of reasoning in the face of true contradictions, such as those arising from the paradoxes of self-reference. In the course of defending this choice of logic in the face of the criticism that this logic is not truth preserving, Priest argued that requirement is too much to ask: since LPm is a nonmonotonic logic, it necessarily fails to preserve truth. In this article, I show that this assumption is incorrect, and I explain why nonmonotonic logics can nonetheless be truth preserving. Finally, I diagnose Priest's error, to explain when nonmonotonic logics do indeed fail to preserve truth.
Keywords paraconsistent  conditionals  paradoxes  inductive logic  nonmonotonic
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DOI 10.1002/tht3.201
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References found in this work BETA

Ways Things Can't Be.Greg Restall - 1997 - Notre Dame Journal of Formal Logic 38 (4):583-596.
Why Priest's Reassurance is Not Reassuring.Jc Beall - 2012 - Analysis 72 (3):517-525.

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Citations of this work BETA

Comment on Restall.Graham Priest - 2016 - Thought: A Journal of Philosophy 5 (2):125-125.
Hard and Soft Logical Information.Allo Patrick - 2017 - Journal of Logic and Computation:1-20.

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