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A comment on The Difference Between ‘Violet’ and ‘Purple’ (2015). Parent comment

Re:The Difference Between ‘Violet’ and ‘Purple’ (2015) by frosted-flakes on Tuesday April 02, 2019 @10:25AM (#19554378)
That's not true, actually. Tetrachromats see the same range of electromagnetic wavelengths as everyone else—there's just an extra cone in there that's mostly useless. There's a great video on YouTube called Tetrachromats Don't Have Superpowers that explains it quite well: https://youtu.be/fDoAs0qN7lU
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Re:The Difference Between ‘Violet’ and ‘Purple’ (2015) by OscarCunningham on Tuesday April 02, 2019 @03:24PM (#19557704)
Lots of animals have the useful form of tetrachromacy though.
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