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What is an atomic state representation?

  • A.The state is a set of objects with relations between them
  • B.The state is a probability distribution over possible worlds
  • C.The state is a single indivisible token with no internal structure
  • D.The state is a vector of variables each with its own value

Answer: C

In an atomic representation states can only be compared for equality, so search algorithms can visit and remember them but cannot reason about what they have in common. It suffices for basic search and for Markov models. Factored representations use variables and structured ones use objects and relations. The choice of representation determines which algorithms are available, which is why it is settled before any algorithm is chosen.

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