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Given the rule and data certainties: 


(rule01 ($and (same cntxt color yellow)   (.8)
              (same cntxt shape sphere)   (.7)
              (same cntxt texture fuzzy)) (.9)
   (conclude cntxt identity tennis-ball tally 400))
What is the certainty of tennis-ball from this rule?

  • A: .9
  • B: .7
  • C: .8
  • D: .32
  • E: .28

    Answer: E

    $and returns the minimum certainty in the premise, .7 ; this becomes tally and is multiplied by the number in the conclusion divided by 1000, i.e. .4 .