Self-defeating arguments |
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Authors: | John L. Pollock |
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Affiliation: | (1) Department of Philosophy, University of Arizona, 85721 Tucson, AZ, USA |
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Abstract: | An argument is self-defeating when it contains defeaters for some of its own defeasible lines. It is shown that the obvious rules for defeat among arguments do not handle self-defeating arguments correctly. It turns out that they constitute a pervasive phenomenon that threatens to cripple defeasible reasoning, leading to almost all defeasible reasoning being defeated by unexpected interactions with self-defeating arguments. This leads to some important changes in the general theory of defeasible reasoning. |
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Keywords: | Argument defeasible nonmonotonic |
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