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Now you are being silly. We use the term 'blue' to mean 'when looked at, we see blue'.
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I don't think that's true. I think when most people refer to an item as blue they really think the blueness is somehow in the item. When people put up blue paint, they aren't thinking that "hey, I'm really putting up a substance that reflects light that I interpret as blue," they think the paint really is blue, and that they see truth in it. Not everybody, but some of the people I've talked to about this subject.
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We don't actually see wavelengths of light.
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Now who's being silly? The rhodospin proteins in the retina absorbs the light that enters the eye. Different wavelengths excite different cells to produce our colour images. That is the process we call sight.
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"X is blue" means "X has the property that makes it seem blue when I look at it under white light",
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Again, I don't think this is how most people think about colour. But maybe I'm wrong and I've just been talking to complete fools before this.