The AGM paradigm of belief change studies the dynamics of belief states in light of new information. Finding, or even approximating, dependent or relevant beliefs to a change is valuable because, for example, it can narrow the set of beliefs considered during belief change operations. Gärdenfors’ preservation criterion (GPC) suggests that formulas independent of a belief change should remain in...

Standard approachs to belief change assume that the underlying logic contains classical propositional logic. Recently there has been interest in investigating approaches to belief change, specifically contraction, in which the underlying logic is not as expressive as full propositional logic. In this paper we consider approaches to belief contraction in Horn knowledge bases. We develop two broa...

In this paper, we present a Non-Bayesian conditioning rule for belief revision. This rule is truly Non-Bayesian in the sense that it doesn’t satisfy the common adopted principle that when a prior belief is Bayesian, after conditioning by X, Bel(X|X) must be equal to one. Our new conditioning rule for belief revision is based on the proportional conflict redistribution rule of combination develo...

The view that children understand the mind via a coherent theory is supported by evidence that children rigidly follow a Seeing = Knowing Rule: seeing, and only seeing, leads to knowing. This paper presents two kinds of evidence that children do not follow this rule. First, we critically review previous findings that children neglect the role of inference and argue that these studies do not in ...

Based on a new demand — the commutativity of belief functions combination with refinement/coarsening of the frame of discernment — the role of the disjunctive rule of combination has increased. To compare the nature of this rule with a more frequent but also more controversional one, i.e. with Dempster’s rule, an algebraic analysis was used. The basic necessary definitions both from the Dempste...

One main topic of the epistemic program of game theory deals with the value of information. To study this question in a broad context, one needs to adapt some of the tools used in multiplayer epistemic logic. A hierarchical belief structure is introduced both in a syntactical and a semantical framework. In the same framework, a generalized notion of message is characterized by its content and i...

Data quality can be measured as accuracy, consistency, completeness. Extended Belief Rule-Base is an efficient method to handle the related vague and uncertain knowledge of problem with precise data. But it does not overcome the problem of accuracy. The proposed method combines the DRA and C4.5 algorithm which is used to improve the accuracy of rule based decision model, without compromising it...