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    Abstract:

    Annotated logic is one of the paraconsistent logics.The entailments in annotated logic are  and |≈. Both of them are paraconsistent, and can treat any set of formulae, either consistent or not, in a uniform way.  is monotonic, it has a resolution based sound and complete proof procedure, but some rational inferences of the classical logic, such as modus ponens, are no longer valid under it.|≈ is nonmonotonic. The classical inferences hold true under it when there is no contradiction. But no satisfactory proof theory for |≈ has been given. This paper will propose sound and complete decision Tableaux for  and |≈ respectively.

    Reference
    1 Shoham Y.Nonmonotonic logics:meaning and utility.In:John McDermott ed.Proc.10th IJCAI,Milan Italy, San Francisco:Morgan Kaufmann.1987.388~393. 2 姜云飞.关于非单调推理中的择优蕴涵.计算机学报,1990,13(10):792~796. 3 Kifer M,Lozinskii E L. A logic for reasoning with inconsistency.J.Automated Reasoning.1992,9:179~215. 4 周生炳.标记逻辑程序理论研究:说明语义与过程语义[博士论文].北京:中国科学院自动化研究所,1994. 5 Nicola Olivetti.Tableaux and sequent calculus for minimal entailment.J.Automated Reasoning.1992,9:99~139. 6 Smullyan M.First—order logic.New York:Springer Verlag,1968.
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程晓春,刘叙华.标记逻辑的TABLEAU判定过程.软件学报,1996,7(11):698-705

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  • Revised:September 13,1995
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