The "noble lie" was not that there's no hierarchy. It was that there was an oracle that the city would be overthrown if the lowest rank became the guardian or leaders of the city. This would lead the people to always let a person's rank be formed appropriately. Higher rank parents would let their offspring be lower rank, and lower rank parents would push their offspring to the higher rank, as would the rest of society. Because they would all fear the city being overthrown.
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>>polyno+pSc