Accommodative revision is a novel method of non-prioritized belief revision. The epistemic state of an agent contains both knowledge that is immune to revision and beliefs that are allowed to change. Incoming information is rst revised by the knowledge of the agent, and then the epistemic state of the agent is revised using this modied input. The properties… (More)
We tackle the problem that arises when an agent receives unbelievable information. Information is unbelievable if it conflicts with the agent’s convictions, that is, what the agent considers knowledge. We propose two solutions based on modifying the information so that it is no longer unbelievable. In one solution, the source and the receiver of the… (More)
We propose a dialogue protocol for situations in which an agent makes to another agent an assertion that the other agent finds impossible to believe. In this interaction, unbelievable assertions are rejected using explanations formed by logical interpolation and new assertions are being made such that all previous rebuttals are taken into account.