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What does a utility function let an agent do under uncertainty?

  • A.Guarantee that it will achieve at least one of its goals
  • B.Compare outcomes by expected value rather than by possibility
  • C.Determine which of its percepts are reliable and which are not
  • D.Reduce the number of states it must consider during search

Answer: B

With probabilities from a model and utilities over outcomes, the agent can compute the expected utility of each action and choose the highest, which is the standard formulation of rational choice under uncertainty. Sensor reliability, search efficiency and guarantees come from elsewhere. Combining a probability distribution with a preference ordering into a single comparable number is what makes decision theory operational, and it is the formal core of the rational agent view.

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