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Legal reasoning with subjective logic

Legal reasoning with subjective logic Judges and jurors must make decisions in an environment of ignoranceand uncertainty for example by hearing statements of possibly unreliable ordishonest witnesses, assessing possibly doubtful or irrelevantevidence, and enduring attempts by the opponents to manipulate thejudge's and the jurors' perceptions and feelings. Three importantaspects of decision making in this environment are the quantificationof sufficient proof, the weighing of pieces of evidence, and therelevancy of evidence. This paper proposes a mathematical frameworkfor dealing with the two first aspects, namely the quantification ofproof and weighing of evidence. Our approach is based on subjectivelogic, which is an extension of standard logic and probability theory,in which the notion of probability is extended by including degrees ofuncertainty. Subjective Logic is a framework for modelling humanreasoning and we show how it can be applied to legalreasoning. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Artificial Intelligence and Law Springer Journals

Legal reasoning with subjective logic

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Publisher
Springer Journals
Copyright
Copyright © Kluwer Academic Publishers 2001
ISSN
0924-8463
eISSN
1572-8382
DOI
10.1023/a:1011219731903
Publisher site
See Article on Publisher Site

Abstract

Judges and jurors must make decisions in an environment of ignoranceand uncertainty for example by hearing statements of possibly unreliable ordishonest witnesses, assessing possibly doubtful or irrelevantevidence, and enduring attempts by the opponents to manipulate thejudge's and the jurors' perceptions and feelings. Three importantaspects of decision making in this environment are the quantificationof sufficient proof, the weighing of pieces of evidence, and therelevancy of evidence. This paper proposes a mathematical frameworkfor dealing with the two first aspects, namely the quantification ofproof and weighing of evidence. Our approach is based on subjectivelogic, which is an extension of standard logic and probability theory,in which the notion of probability is extended by including degrees ofuncertainty. Subjective Logic is a framework for modelling humanreasoning and we show how it can be applied to legalreasoning.

Journal

Artificial Intelligence and Law – Springer Journals

Published: Dec 1, 2000

Keywords: artificial; belief; court; law; probability; reasoning; uncertainty

References

  • Risk, Ambiguity, and the Savage Axioms
    Ellsberg, D.
  • Relevance, probability and the law
    James, W.
  • Quantifying burdens of proof
    Simon, R.; Mahan, L.
  • The transferable belief model
    Smets, P.; Kennes, R.
  • Interpretation of statistical evidence in criminal trials: The prosecutor's fallacy and the defense attorney's fallacy
    Thompson, W.; Schumann, E.
  • Review of Shafer's a mathematical theory of evidence
    Zadeh, L.