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An Example:
A simple example would be something like a door. The door only really has three possible 'states':

  • open
  • closed
  • partially open (or partially closed if you're a pessimist)

    and there would be a transition from each state to each other relevant state.

  • door is closed. begin opening
  • door is partially open, continue opening
  • door is still partially open, continue closing
  • door is open, begin closing
  • do nothing - leave the door alone
    		•
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