Plato’s Cave is a famous allegory from philosophy that describes a fictional scenario where people mistake an illusion for reality.

The allegory describes a group of people who have lived their whole lives as prisoners chained motionless in a dark cave, forced to face a blank wall. Behind the prisoners is a large fire, and behind the fire are puppeteers that project shadows onto the cave wall, acting out little plays, which include mimicking voices and sound effects that echo off the cave walls. These shadows and echoes are only projections, partial reflections of a reality created by the puppeteers. However, this illusion represents the only reality the prisoners have ever known, and so to them the shadows are real sights and the echoes are real sounds.

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