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Originally Posted by Yakk
False, The single-frequency colour fallacy, yet again.
The human eye and brain can't percieve wavelengths. They can percieve how some pigments respond to various wavelengths. Pure wavelengths have a perceptual colour, but the perceptual colour is not determined by a range of wavelengths.
Light in that range implies the light is red. Red light is not defined by that range.
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My point was, that we can define 'red' in terms completely ignoring humans, eyes, or any kind of conscious perception. We can define a colour as an objective propery of an object.