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Which approach reasons from a model of how a device works?

  • A.Neural network reasoning, which learns a mapping directly from a large collection of examples
  • B.Model-based reasoning
  • C.Rule-based reasoning, which encodes the associations an experienced diagnostician has learned
  • D.Case-based reasoning

Answer: B

Model-based diagnosis simulates the correct behaviour of a device from its structure and component models, then localises faults by comparing prediction with observation. It handles novel faults that no rule anticipated, at the cost of needing a model. Rule-based, case-based and connectionist approaches make different trades. The contrast between shallow associations and deep models is the central distinction here. Naming the cost of a choice alongside its benefit is what turns a fact into a design decision.

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