Causalidade e Dependência em Raciocínio Sobre Ações
Varzinczak, Ivan J.
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Assuntoreasoning about actions
In this work we propose a solution to the frame and ramification problems in terms of a dependence relation that points out the circumstances in which a certain action may change the truth value of a given literal. Such relation can be viewed as a weak causal notion, which is considered fundamental for correctly reasoning about actions. Once integrated in the base formalism of the Logic of Actions and Plans LAP, it gives us a simple and powerful causal approach to deal with problems involving actions. In this text we make a systematic comparison among other recent formalisms with the same purposes. We also show how to integrate the dependence relation in the modal formalism of LAP, establishing soundness and completeness proofs for the axiomatic system and the tableau based proof method so defined. Finally, by means of some classical scenarios of the area and other ones that we propose here, we show the advantages of our approach with respect to other formalisms in the literature.
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