Computational Dialogic Defeasible Reasoning

Argumentation 17 (4):421-450 (2003)
This article begins with an introduction to defeasible (nonmonotonic) reasoning and a brief description of a computer program, EVID, which can perform such reasoning. I then explain, and illustrate with examples, how this program can be applied in computational representations of ordinary dialogic argumentation. The program represents the beliefs and doubts of the dialoguers, and uses these propositional attitudes, which can include commonsense defeasible inference rules, to infer various changing conclusions as a dialogue progresses. It is proposed that computational representations of this kind are a useful tool in the analysis of dialogic argumentation, and, in particular, demonstrate the important role of defeasible reasoning in everyday arguments using commonsense reasoning.
Keywords commonsense reasoning  computational logic  defeasible reasoning  dialogue  logic  nonmonotonic reasoning  rhetoric
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DOI 10.1023/A:1026342520498
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