I don't see anything that would warrant the claim, "the answer, explained fully for the first time in a new scientific paper, is in the eye of the beholder."

Perhaps the idea that violet plus blue yields blue as a metamer, maybe - not that I know better. It is well known, however, that color is determined from the spectral irradiance that enters the eye and the spectral response of the eye. There are other oddities regarding eye response, too.

Our response in violet is very weak and the sun's radiance is stronger in blue than violet, too. Further, the energy of each "violet" photon is higher than the others. This means that even if the level of intensity (wattage) for violet was the same as blue, the cones would register more blue since there would be more "blue" photons. It would not be a dramatic difference, however. The first two points are the key factors.

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Lighten up! This is a stellar board! Author: duh.

"The Sun, with all the planets revolving around it, and depending on it, can still ripen a bunch of grapes as though it had nothing else in the universe to do..." Author: Galileo supposedly.