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SHYSTER-MYCIN: A Hybrid Legal Expert System

Thomas A O'Callaghan
affiliation not provided to SSRN

James Popple
Australian National University; Government of the Commonwealth of Australia - Attorney Generals Department

Eric McCreath
Australian National University



Proceedings of the Ninth International Conference on Artificial Intelligence and Law (ICAIL-03), June 2003

Abstract:     
SHYSTER-MYCIN combines a case-based legal expert system (SHYSTER) with a rule-based expert system (MYCIN) to form a hybrid legal expert system. MYCIN's reporting has been improved for use with SHYSTER-MYCIN to provide more useful information about the system's conclusions.

SHYSTER-MYCIN's output was tested against that of a group of lawyers, not expert in the test domain (Australian copyright law). This allowed the system's reasoning, rather than its depth of knowledge, to be tested. Testing indicates that SHYSTER-MYCIN's approach to the law - using a rule-based system to reason with legislation and a case-based system to reason with cases - is appropriate.

Keywords: law, legal, expert systems, artificial intelligence, jurisprudence, legal reasoning, hybrid, evaluation, testing, MYCIN, SHYSTER

Accepted Paper Series

Date posted: January 31, 2009 ; Last revised: January 31, 2009

Suggested Citation

O'Callaghan, Thomas A, Popple, James and McCreath, Eric, SHYSTER-MYCIN: A Hybrid Legal Expert System (June 26, 2003). Proceedings of the Ninth International Conference on Artificial Intelligence and Law (ICAIL-03), June 2003. Available at SSRN: http://ssrn.com/abstract=1335659


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Contact Information

James Popple (Contact Author)
Australian National University ( email )
Australia
HOME PAGE: http://www.popple.net/james/

Government of the Commonwealth of Australia - Attorney Generals Department ( email )
Australia
HOME PAGE: http://www.popple.net/james/
Eric McCreath
Australian National University
Australia

Thomas A O'Callaghan
affiliation not provided to SSRN
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