Abstract
We investigate a system for knowledge and belief, as introduced in Kraus and Lehmann's [KL]. In [KL] it is observed, that adding the axiom Biφ → BiKiφ to the system gives a collapse of knowledge and belief: (Kiφ ↔ Biφ). We investigate the cause(s) of this problem and suggest a ‘similar’ system that does allow the same axiom without the mentioned collapse. We consider as the main benefit of this paper, however, the techniques that are developed to come to this solution. It appears that applying basic correspondence theory to a multi-modal system allows a systematic examination of possible combinations of epistemic operators.
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© 1991 Springer-Verlag Berlin Heidelberg
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van der Hoek, W. (1991). Systems for knowledge and beliefs. In: van Eijck, J. (eds) Logics in AI. JELIA 1990. Lecture Notes in Computer Science, vol 478. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0018447
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DOI: https://doi.org/10.1007/BFb0018447
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