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What does an agent's internal state summarise?

  • A.The set of goals the agent is currently attempting to achieve
  • B.The aspects of history relevant to choosing future actions
  • C.Every percept the agent has received since it began operating
  • D.The complete state of the environment including unobserved parts

Answer: B

Internal state is a compression of the percept history that retains what matters for future decisions and discards the rest, which is what makes a model based agent feasible where a table driven one is not. Storing everything is unnecessary, the unobserved environment is by definition not directly available, and goals are held separately. Deciding what to remember is itself a design question, and getting it wrong shows up as an agent that cannot distinguish situations it needs to.

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