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In addition to the chained people, there are other people in the cave. Plato refers to them as the puppet-handlers and they are the ones holding those in the cave captive. (It is important to realize that the prisoners do not realize this--in fact, the prisoners do not even realize that they are being held captive since this existence is all they have ever known.) Walking behind the prisoners, the puppet-handlers hold up various objects found in the real world. Due to a fire that is burning the mouth of the cave, the prisoners are able to see the objects and each other only as distorted, flickering shadows on the cavern wall in front of them.