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Problem Characteristics

Problem Characteristics. Is the problem decomposable? Can solution steps be ignored or undone? Is the universe predictable? Is a good solution absolute or relative? Is the solution a state or a path? What is the role of knowledge? Does the task require interaction with a person?.

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Problem Characteristics

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  1. Problem Characteristics • Is the problem decomposable? • Can solution steps be ignored or undone? • Is the universe predictable? • Is a good solution absolute or relative? • Is the solution a state or a path? • What is the role of knowledge? • Does the task require interaction with a person?

  2. Production system characteristics • Monotonic: execution of a rule never prevents the execution of other applicable rules • Non-monotonic: without this property • Partially commutative: if application of a particular sequence of rules transforms state x into state y, then any permutation of those rules that are allowable, transforms x into y • Commutative: monotonic + partially commutative

  3. Problems and production system

  4. Problems and production system

  5. Sample problems - 8-puzzle

  6. Sample problems - 8-puzzle

  7. Sample problems - 8 queens

  8. Sample problems - 8 queens

  9. Sample problems - 8 queens

  10. Sample problems - Cryptarithmetic

  11. Sample problems - Cryptarithmetic

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