If the barber only cuts the hair of people who don't cut their own hair, who cuts the barbers hair...?
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	They get another barber to cut their hair and then vise-versa
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	Destiny is too cheap to create two barbers for the tower. That's all I got.
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	Well that's harsh
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	I should have mentioned that there is only 1 barber in the original post. It's a logical paradox that gets passed around.