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A Method for Reasoning about other Agents' Beliefs from Observations Nittka, Alexander Booth, Richard Belief revision iterated revision non-prioritised revision non-monotonic reasoning rational closure rational explanation Traditional work in belief revision deals with the question of what an agent should believe upon receiving new information. We will give an overview about what can be concluded about an agent based on an observation of its belief revision behaviour. The observation contains partial information about the revision inputs received by the agent and its beliefs upon receiving them. We will sketch a method for reasoning about past and future beliefs of the agent and predicting which inputs it accepts and rejects. The focus of this talk will be on different degrees of incompleteness of the observation and variants of the general question we are able to deal with. Schloss Dagstuhl – Leibniz-Zentrum für Informatik Alexander Nittka and Richard Booth 2007 Is Part Of Dagstuhl Seminar Proceedings, Volume 7351, Formal Models of Belief Change in Rational Agents (2007) InProceedings Text doc-type:ResearchArticle publishedVersion application/pdf doi:10.4230/DagSemProc.07351.6 urn:nbn:de:0030-drops-12148 https://drops.dagstuhl.de/entities/document/10.4230/DagSemProc.07351.6 eng https://creativecommons.org/licenses/by/4.0/legalcode