Processing Certainty Factors

Two basic issues:

Certainty threshold

Within an inference engine, a threshold value typically is chosen for certainty factors

Computing certainty factors

Several approaches are possible to combine certainty factors.
Here is one approach, patterned after TMycin by Gordon Novak

Proceed in 2 steps

  1. Determine confidence in rule conditions being met
  2. Base confidence on rule conclusions on condition confidence and rule confidence factor

Confidence in Rule Conditions

Confidence in conclusions, given hypotheses


created May 13, 2003
last revised May 13, 2003
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