If - Then Rules with uncertainty measures

Uncertainty measures can be used in rule based systems to indicate the level of confidence associated with a production rule.

For example, suppose an ideal world with everlasting lightbulbs and an interruptible power source. A production rule may state :

In this case no uncertainty measures are required due to the unrealistic assumptions made. In the real world the power may be cut off or the bulb may blow and an uncertainty measure associated with this rule as follows :

IF light switch turned to on THEN light comes on WITH 95% CONFIDENCE

Combining confidence levels when chaining rules can become quite a complex procedure see Rich and Knight (1991) for further details.

Table of Contents

References

Authored by Serengul Smith

E-mail to: serengul1@mdx.ac.uk
School of Computing Science Middlesex University
Revised: September 1998