TitleCoherence as an Inclusive Notion of Rationality
Publication TypeConference Paper
Year of Publication2009
AuthorsJoseph S, Schorlemmer M, Sierra C
EditorSandri S, Sànchez-Marrè M, Cortés U
Conference NameArtificial Intelligence Research and Development. Proceedings of the 12th International Conference of the Catalan Association for Artificial Intelligence
PublisherIOS Press
Conference LocationCardona, Catalonia, Spain
Date Published21/10/2009
ISBN Number978-1-67050-061-2
KeywordsCoherence, Rationality

We propose utility coherence graphs along with coherence maximisation based on Thagard's theory of coherence as an alternative to utility functions to model rational behaviour of agents. We show that the traditional behaviour of utility functions can be emulated using our approach and prove that \emph{the maximum element of a preference ordering is the same as that found by coherence maximisation over a corresponding utility coherence graph}. We argue that utility coherence graphs have marked advantages over utility functions, in that they blend well with the internal representation and reasoning of cognitive agents, and in that they can model the dynamism and uncertainty inherent in the rational behaviour of agents. We illustrate this by modeling the prisoner's dilemma with a utility coherence graph.