Rule-Based Systems

One of the most popular methods for representing knowledge is in the form of Production Rules. These are in the form of:

if conditions then conclusion

Example: MYCIN[Shortliffe, Edward H., Computer Based Medical Consultations: MYCIN, American Elsevier, 1976. Buchanan, Bruce G. and Shortliffe, Edward H., Rule-Based Expert Systems, Addison-Wesley, 1984.]

Rule 27
If 1) the gram stain of the organism is gram
      negative, and
   2) the morphology of the organism is rod, and
   3) the aerobicity of the organism is
      anaerobic,
Then: There is suggestive evidence (0.6) that
      the identity of the organism is
      Bacteroides.