2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/30345We show that Gabbay's nonmonotonic consequence relations can be reduced to a new family of relations, called entrenchment relations. Entrenchment relations provide a direct generalization of epistemic entrenchment and expectation ordering introduced by Gardenfors and Makinson for the study of belief revision and expectation inference, respectively.22 pages, a paper in preliminary form that appeared later in conference proceedingsLogic in Computer ScienceArtificial IntelligenceF.4.1;I.2.3text