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Changing One's Mind: Erase or Rewind? Possibilistic Belief Revision with Fuzzy Argumentation based on Trust

Célia da Costa Pereira 1 Andrea G.B. Tettamanzi 2 Serena Villata 3
1 Laboratoire d'Informatique, Signaux, et Systèmes de Sophia-Antipolis (I3S) / Equipe KEIA
Laboratoire I3S - SPARKS - Scalable and Pervasive softwARe and Knowledge Systems
3 WIMMICS - Web-Instrumented Man-Machine Interactions, Communities and Semantics
CRISAM - Inria Sophia Antipolis - Méditerranée , Laboratoire I3S - SPARKS - Scalable and Pervasive softwARe and Knowledge Systems
Abstract : We address the issue, in cognitive agents, of possible loss of previous information, which later might turn out to be correct when new information becomes available. To this aim, we propose a framework for changing the agent's mind without erasing forever previous information, thus allowing its recovery in case the change turns out to be wrong. In this new framework, a piece of information is represented as an argument which can be more or less accepted depending on the trustworthiness of the agent who proposes it. We adopt possibility theory to represent uncertainty about the information, and to model the fact that information sources can be only partially trusted. The originality of the proposed framework lies in the following two points: (i) argument reinstatement is mirrored in belief re-instatement in order to avoid the loss of previous information; (ii) new incoming information is represented under the form of arguments and it is associated with a plausibility degree depending on the trustworthiness of the information source.
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Célia da Costa Pereira, Andrea G.B. Tettamanzi, Serena Villata. Changing One's Mind: Erase or Rewind? Possibilistic Belief Revision with Fuzzy Argumentation based on Trust. IJCAI, International Joint Conference on Artificial Intelligence, Jul 2011, Barcelone, Spain. ⟨hal-01328696⟩

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