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- Title
Two Concepts of Plausibility in Default Reasoning.
- Authors
Rott, Hans
- Abstract
In their unifying theory to model uncertainty, Friedman and Halpern (1995-2003) applied plausibility measures to default reasoning satisfying certain sets of axioms. They proposed a distinctive condition for plausibility measures that characterizes 'qualitative' reasoning (as contrasted with probabilistic reasoning). A similar and similarly fundamental, but more general and thus stronger condition was independently suggested in the context of 'basic' entrenchment-based belief revision by Rott (1996-2003). The present paper analyzes the relation between the two approaches to formalizing basic notions of plausibility as used in qualitative default reasoning. While neither approach is a special case of the other, translations can be found that elucidate their relationship. I argue that Rott's notion of plausibility allows for a more modular set-up and has a better philosophical motivation than that of Friedman and Halpern.
- Subjects
PLAUSIBILITY (Logic); DEFAULT reasoning; EXPECTATION (Philosophy); PROPOSITION (Logic); AXIOMS
- Publication
Erkenntnis, 2014, Vol 79, p1219
- ISSN
0165-0106
- Publication type
Article
- DOI
10.1007/s10670-013-9548-y