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Another perspective on Default Reasoning (1992)
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| Venue: | Ann. Math. Artif. Intell |
| Citations: | 97 - 0 self |
BibTeX
@ARTICLE{Lehmann92anotherperspective,
author = {Daniel Lehmann},
title = {Another perspective on Default Reasoning},
journal = {Ann. Math. Artif. Intell},
year = {1992},
volume = {15},
pages = {61--82}
}
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Abstract
The lexicographic closure of any given finite set D of normal defaults is defined. A conditional assertion a b is in this lexicographic closure if, given the defaults D and the fact a, one would conclude b. The lexicographic closure is essentially a rational extension of D, and of its rational closure, defined in a previous paper. It provides a logic of normal defaults that is different from the one proposed by R. Reiter and that is rich enough not to require the consideration of non-normal defaults. A large number of examples are provided to show that the lexicographic closure corresponds to the basic intuitions behind Reiter's logic of defaults. 1 Plan of this paper Section 2 is a general introduction, describing the goal of this paper, in relation with Reiter's Default Logic and the program proposed in [12] by Lehmann and Magidor. Section 3 first discusses at length some general principles of the logic of defaults, with many examples, and, then, puts this paper in perspe...
