Annotated defeasible logic. Issue 5 (22nd August 2017)

• Record Type: Journal Article
• Authors: GOVERNATORI, GUIDO; MAHER, MICHAEL J.
• Editors: Rocha, Ricardo; Cao Son, Tran
• Is Part Of: Theory and practice of logic programming. Volume 17:Issue 5/6(2017)
• Page Start: 819
• Page End: 836
• Publication Date: 2017-08-22
• Subjects: defeasible logic, -- non-monotonic reasoning, -- annotated logics, -- legal reasoning; Logic programming -- Periodicals; Artificial intelligence -- Computer programs -- Periodicals; Constraint programming (Computer science) -- Periodicals; 005.115
• DOI: 10.1017/S1471068417000266
• Languages: English
• ISSNs: 1471-0684

Abstract

Abstract: Defeasible logics provide several linguistic features to support the expression of defeasible knowledge. There is also a wide variety of such logics, expressing different intuitions about defeasible reasoning. However, the logics can only combine in trivial ways. This limits their usefulness in contexts where different intuitions are at play in different aspects of a problem. In particular, in some legal settings, different actors have different burdens of proof, which might be expressed as reasoning in different defeasible logics. In this paper, we introduce annotated defeasible logic as a flexible formalism permitting multiple forms of defeasibility, and establish some properties of the formalism.