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by used_noise 2251 days ago
I'm not convinced that blind mathematicians count as their own species, nor that they echolocate, and so it doesn't seem to say much about his theory one way or the other.
2 comments

Humans can learn/be taught echolocation. https://en.wikipedia.org/wiki/Human_echolocation
> nor that they echolocate

How can you be sure?