Jumps and logic in the law

Artificial Intelligence and Law 4 (3-4):297-329 (1996)
The main stream of legal theory tends to incorporate unwritten principles into the law. Weighing of principles plays a great role in legal argumentation, inter alia in statutory interpretation. A weighing and balancing of principles and other prima facie reasons is a jump. The inference is not conclusive.To deal with defeasibility and weighing, a jurist needs both the belief-revision logic and the nonmonotonic logic. The systems of nonmonotonic logic included in the present volume provide logical tools enabling one to speak precisely about various kinds of rules about rules, dealing with such things as applicability of rules, what is assumed by rules, priority between rules and the burden of proof. Nonmonotonic logic is an example of an extension of the domain of logic. But the more far-reaching the extension is, the greater problems it meets. It seems impossible to make logical reconstruction of the totality of legal argumentation.
Keywords coherence  defeasibility  nonmonotonic logic  principles  weighing
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DOI 10.1007/BF00118495
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References found in this work BETA
Objective Knowledge.Karl R. Popper - 1972 - Oxford, Clarendon Press.
Fact, Fiction, and Forecast.Nelson Goodman - 1955 - Harvard University Press.
The Structure of Scientific Revolutions.Thomas S. Kuhn - 1962 - University of Chicago Press.

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