Principally yes. But I always get intellectually jittery when something is supposed to have evolved for/caused by two or more purposes.
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Makes me wonder if it can be replicated (or was already conducted) among groups of vastly different skin tones. Or if it falls prey to the "all X people look alike" trope, where they are unable to distinguish from things they are unfamiliar with.
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Charles Darwin already noted that facial blushing can readily be observed even in very dark skinned people(s).
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Seeing as "white" skin is evolutionarily recent, I doubt this hypothesis.
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i thought of that immediately..but since this is talking about primates, the argument is not that bad. I'd say that over the last 10M years, facial skin color probably went lighter and darker several times. Many primates have light faces
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Have you compared these results vs research/tests on monkeys or apes in RCT environments? Someone must have found out if apes/monkeys prefer fruit/berry that is red, blue, green, yellow, etc?
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this is super interesting!
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