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Epistemic graphs for representing and reasoning with positive and negative influences of arguments

Hunter, Anthony, Polberg, Sylwia ORCID: and Thimm, Matthias 2020. Epistemic graphs for representing and reasoning with positive and negative influences of arguments. Artificial Intelligence 281 , 103236. 10.1016/j.artint.2020.103236

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This paper introduces epistemic graphs as a generalization of the epistemic approach to probabilistic argumentation. In these graphs, an argument can be believed or disbelieved up to a given degree, thus providing a more fine–grained alternative to the standard Dung's approaches when it comes to determining the status of a given argument. Furthermore, the flexibility of the epistemic approach allows us to both model the rationale behind the existing semantics as well as completely deviate from them when required. Epistemic graphs can model both attack and support as well as relations that are neither support nor attack. The way other arguments influence a given argument is expressed by the epistemic constraints that can restrict the belief we have in an argument with a varying degree of specificity. The fact that we can specify the rules under which arguments should be evaluated and we can include constraints between unrelated arguments permits the framework to be more context–sensitive. It also allows for better modelling of imperfect agents, which can be important in multi–agent applications.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Computer Science & Informatics
Publisher: Elsevier
ISSN: 0004-3702
Funders: EPSRC, Deutsche Forschungsgemeinschaft
Date of First Compliant Deposit: 14 January 2020
Date of Acceptance: 7 January 2020
Last Modified: 06 Nov 2023 17:15

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