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What is a belief state in conformant planning?

  • A.The record of what the agent has observed since starting
  • B.The set of states the agent might currently be in
  • C.The agent's degree of confidence that the plan will succeed
  • D.The state the agent believes to be most likely at present

Answer: B

Since the agent cannot tell which state it occupies, it reasons about the whole set and an action maps one set to another. The goal is reached when every state in the belief satisfies it. Confidence, most likely states and observation histories are different notions. Lifting a problem from states to sets of states is the standard treatment of partial observability and it costs an exponential in the size of the space.

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