Since I was talking to @CovfefeAnon about whether "race" is a binary category or a smooth manifold, I thought it would be interesting to do a thesis-antithesis-synthesis in pictures.
Thesis:pic.twitter.com/hqEBmNmOBg
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Even species where that is the case - polar bears and brown bears - no one has any trouble recognizing that they are separate species and there's no continuum of polar-brown bears.
I think polar bears and grizzly bears are breeding to make pizzly bears. "Species" is a man-made category that nature doesn't actually care about.https://en.m.wikipedia.org/wiki/Grizzly%E2%80%93polar_bear_hybrid …
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