“When you cannot measure it, when you cannot express it in numbers, you have scarcely, in your thoughts, advanced to the stage of Science, whatever the matter may be."
So, what is needed is a quantification of the hypotheses in terms of genetics, and this could indeed interlace with the NPA model -- since our model does, in fact, propose genetic traits for sanguinity and non-sanguinity. Once the quantification is done in terms of identifiable genetic traits, then one can start thinking about specific hypotheses that could be tested in family and case-control studies. Ideally, this would be tackled by an individual or group with training in evolutionary genetics, and having an interest in the genetics of personality, as well.
The NPA model is far from conventional wisdom, and it is clear that MC has not considered sanguinity and non-sanguinity as linked to clearly inherited, discrete personality traits.
As for the color-correcting eyeglasses, this aspect of his “theory” also needs quantification and controlled studies, which I do not believe have been done.
Having said the above, I would not be surprised if MC's premise -- that the evolution of color perception in humans has been driven to a large degree by the necessity to perceive accurately sanguinity and non-sanguinity -- tuns out to be correct.
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