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Arrange the phases of building an expert system in the usual order.

1. Encode the knowledge in the shell

2. Identify a suitable domain

3. Validate against expert judgement

4. Elicit knowledge from the expert

Select the correct sequence.

  • A.1, 2, 3, 4
  • B.2, 1, 4, 3
  • C.4, 1, 2, 3
  • D.2, 4, 1, 3

Answer: D

Domain selection comes first, since an unsuitable task cannot be rescued later, then elicitation, then encoding, then validation against expert judgement, giving 2, 4, 1, 3. The phases in practice iterate rather than run once, with validation sending the engineer back to elicitation. Rapid prototyping, rather than a single pass, was the characteristic development style of the field.

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