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What is the blocks world?

  • A.A simple domain of stacking blocks used to illustrate planning
  • B.A representation in which the state is divided into blocks
  • C.A benchmark measuring how many blocks of memory a planner uses
  • D.A domain in which actions are blocked by their preconditions

Answer: A

The blocks world has a handful of predicates and one or two actions, yet exhibits goal interactions that defeat naive planners, which is why it has served as an illustration for decades. Its very simplicity is what makes it useful pedagogically and limited as a benchmark. The other options misread the name. A minimal example that nonetheless contains the essential difficulty is worth more for teaching than a realistic one that obscures it. The shared properties explain why these belong to one family, and the differences explain why more than one exists.

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