Disbelief Change
	Anna Gomolinska David Pearce
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	Keywords: AGM theory, Rejection consequence
	Abstract: In the paper we address the problem of change of belief state of a rational agent. In our representation of belief state both beliefs and disbeliefs are taken into account. On the belief part, the starting point is the AGM theory [1, 5, 6]. On the disbelief part, we build a counterpart of the AGM model starting with the rejection consequence Cn´ introduced in [2, 4]. Next we investigate changes of pairs of sets of formulae representing belief states.
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	Anna Gomolinska, anna.gom@math.uwb.edu.pl University of Bialystok, Poland David Pearce, pearce@dfki.de DFKI Saarbrücken Germany
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