Papers by Willem Labuschagne
Abstract. We explore the notion of duality for defeasible entailment relations induced by prefere... more Abstract. We explore the notion of duality for defeasible entailment relations induced by preference orderings on states. We then show that such preferential entailment relations
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Journal of Logic, Language and Information, 2000
Epistemic entrenchment, as presented by G'rdenfors and Makinson in (1988) and G'rdenfors ... more Epistemic entrenchment, as presented by G'rdenfors and Makinson in (1988) and G'rdenfors in(1988), is a formalisation of the intuition that, when forced to choose between two beliefs, an agent will give upthe less entrenched one. While their formalisation satisfactorily captures the intuitive notion of the entrenchmentof beliefs in a number of aspects, the requirement that all wffs be comparable has
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Journal of Logic, Language and Information, 2000
Generalisations of theory change involving operations on arbitrary sets of wffs instead of on bel... more Generalisations of theory change involving operations on arbitrary sets of wffs instead of on beliefsets (i.e. sets closed under a consequence relation), have become known as base change. In one view, a base shouldbe thought of as providing more structure to its generated belief set, which means that it can be employed todetermine the theory contraction operation associated with a
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Lecture Notes in Computer Science, 2013
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2011 Information Security for South Africa, 2011
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Synthese, 2007
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Journal of Philosophical Logic, 2009
Abstract We introduce and explore the notion of duality for entailment relations induced by prefe... more Abstract We introduce and explore the notion of duality for entailment relations induced by preference orderings on states. We discuss the relation-ship between these preferential entailment relations from the perspectives of Boolean algebra, inference rules, and modal axiomatisation. ...
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Journal of Universal Computer Science - J.UCS, 2004
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Journal of Philosophical Logic, 2002
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Papers by Willem Labuschagne