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Artificial Intelligence Forthcoming Papers M. Freund, Preferential reasoning in the perspective of Poole default logic The sceptical inference relation associated with a Poole system without constraints is known to have a simple semantic representation by means of a smooth order directly defined on the set of interpretations associated with the underlying language. Conversely, we prove in this paper that, on a finite propositional language, any preferential inference relation defined by such adoi:10.1016/s0004-3702(97)90001-1 fatcat:zcjn5iiajrfzxov5eqjyac34s4