# There is a circle 

By [clintxu](https://paragraph.com/@clintxu) · 2022-05-07

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how to know a dog? someone always points a real dog, then we get a abstraction of a dog, but, if we don’t know what’s the meaning of a dog, how to recognize a real dog? there is a circle

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*Originally published on [clintxu](https://paragraph.com/@clintxu/there-is-a-circle)*