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What is an episodic environment?

  • A.The agent's performance is measured once at the end of a long run
  • B.Each decision is independent of those before and after it
  • C.The environment resets to its initial state after each action
  • D.The agent receives its percepts in discrete episodes rather than continuously

Answer: B

In an episodic task the choice in one episode does not affect later ones, as in classifying items on a conveyor, so no lookahead is needed. In a sequential task, as in chess or driving, present choices have long term consequences and planning becomes essential. Resetting, discrete perception and end of run scoring are different notions. Whether decisions interact is one of the strongest determinants of how hard a task is.

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