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What is the principle of least commitment?

  • A.Choosing whichever action has the fewest preconditions first
  • B.Deferring every choice until it is forced by the problem
  • C.Committing to the first plan that satisfies the goal
  • D.Making the smallest possible change to an existing plan

Answer: B

By leaving orderings and variable bindings open until a conflict compels a decision, the planner avoids backtracking over choices that never mattered. The same principle produces the most general unifier in resolution. Early commitment, minimal repair and precondition counting are different notions. A principle that appears independently in planning, unification and constraint solving is worth recognising in its general form.

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