Prime rule-based methodologies give inadequate control

Authors:
J R B Cockett;J Herrera
Affiliations:
Computer Science Department, University of Tennessee, Knoxville, TN;Electrical Engineering Department, University of Tennessee, Knoxville, TN
Venue:
ISMIS '86 Proceedings of the ACM SIGART international symposium on Methodologies for intelligent systems
Year:
1986

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Abstract

The use of rule-based methodologies in the development of Expert Systems is widespread. In order to provide good explanations in these systems it is desirable that the rules be prime. The difficulty of expressing control in such rules, and thus arriving at a desirable sequencing of events, has led to pragmatic additions to the basic methodology. Recent developments in the theory of decision processes have provided new insight into the form of a desirable sequencing. Prime rules, even when augmented by sophisticated control strategies, cannot generate from backward chaining all these desirable sequencings. Furthermore, if one of these desirable sequencings happens to be generated from prime rules it may be by luck rather than design.