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A comment on Roger Penrose – Is Mathematics Invented or Discovered? [video]. Parent comment

Re:Roger Penrose – Is Mathematics Invented or Discovered? [v... by used_noise on Friday April 17, 2020 @09:45AM (#22898915)
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.
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Re:Roger Penrose – Is Mathematics Invented or Discovered? [v... by red75prime on Saturday April 18, 2020 @09:56AM (#22907747)
Humans can learn/be taught echolocation. https://en.wikipedia.org/wiki/Human_echolocation
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Re:Roger Penrose – Is Mathematics Invented or Discovered? [v... by Koshkin on Friday April 17, 2020 @04:22PM (#22902609)
> nor that they echolocate

How can you be sure?

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