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Which difficulty arises when two experts disagree about a case?

  • A.The shell will refuse to load a knowledge base in which two rules draw opposing conclusions
  • B.The knowledge base has no principled way to choose between them
  • C.The inference engine will fire both of the conflicting rules and produce two separate answers
  • D.The explanation facility cannot report either view

Answer: B

Expert disagreement leaves the knowledge engineer arbitrating a question neither the formalism nor the engine can settle, and whichever view is encoded becomes the system's opinion. Conflict resolution will pick one rule, so no double answer appears, explanation reports whatever fired, and shells load contradictory rules without complaint. Measuring the extent of disagreement among experts is therefore part of validation, since a system cannot reasonably be held to a standard the experts themselves do not meet.

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