Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Another perspective on Default Reasoning   The lexicographic closure of any given finite set D of normal defaults is
defined. A conditional assertion "if a then 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.

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The categories of this paper are: funct-an
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ex
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The categories of this paper are: comp-gas
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The categories of this paper are: gr-qc
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The categories of this paper are: math-ph
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The categories of this paper are: adap-org
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The categories of this paper are: math
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The categories of this paper are: eess
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The categories of this paper are: solv-int
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The categories of this paper are: chao-dyn
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The categories of this paper are: nlin
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The categories of this paper are: econ
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The categories of this paper are: q-fin
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The categories of this paper are: mtrl-th
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The categories of this paper are: q-bio