SHYSTER-MYCIN: A Hybrid Legal Expert System

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 casebased system to reason with cases—is appropriate.

• Type: Conference
• Year: 2003
• Where: ICAIL
• Authors: Thomas A. O'Callaghan, James Popple, Eric McGreath
• Keywords: Case-based Legal Expert, Expert System, ICAIL 2003, Legal Expert