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22 lines
707 B
22 lines
707 B
2 years ago
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Exercise 4.64: Louis Reasoner mistakenly deletes
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the outranked-by rule (4.4.1) from the data base. When he
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realizes this, he quickly reinstalls it. Unfortunately, he makes a slight
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change in the rule, and types it in as
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(rule (outranked-by ?staff-person ?boss)
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(or (supervisor ?staff-person ?boss)
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(and (outranked-by ?middle-manager
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?boss)
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(supervisor ?staff-person
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?middle-manager))))
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Just after Louis types this information into the system, DeWitt Aull comes by
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to find out who outranks Ben Bitdiddle. He issues the query
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(outranked-by (Bitdiddle Ben) ?who)
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After answering, the system goes into an infinite loop. Explain why.
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