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Only persistence makes nonmonotonicity monotonous

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  • Nonmonotonic Reasoning
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Logics in Artificial Intelligence (JELIA 1996)

Part of the book series: Lecture Notes in Computer Science ((LNAI,volume 1126))

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Abstract

An important characteristic of many logics for artificial intelligence is that they are nonmonotonic. This means that adding a formula to the premises can destroy some of the consequences. There may exist formulae that can always be safely added to the premises without destroying any of the consequences: they respect monotonicity. We consider three preferential logics for which we analyze the class of formulae which respect monotonicity. For each of the three logics we show that this class is equal to the class of formulae preserved under going to more preferred models, and we provide syntactic characterizations of these classes.

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José Jülio Alferes Luís Moniz Pereira Ewa Orlowska

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© 1996 Springer-Verlag Berlin Heidelberg

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Engelfriet, J. (1996). Only persistence makes nonmonotonicity monotonous. In: Alferes, J.J., Pereira, L.M., Orlowska, E. (eds) Logics in Artificial Intelligence. JELIA 1996. Lecture Notes in Computer Science, vol 1126. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-61630-6_11

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  • DOI: https://doi.org/10.1007/3-540-61630-6_11

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-61630-6

  • Online ISBN: 978-3-540-70643-4

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