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@ethang5
Firstly, you've changed your argument, likely to save face from failing to recognise the way I was using colour (i.e. not in regards to skin colour). Given your new argument (one which doesn't display your embarrassing mistake), I presume that you dropped the old one.
And you were wrong in doing so.Many hues of red are still considered red, that is not the case with race. Any dilution means a person can no longer be considered pure. Your analogy suffered from the fallacy of false equivalency.
Even if there is genetic admixture (i.e. racemixing) involved, would you not agree that certain populations, that grew up in certain environments, express certain characteristics? For example, do you think it is purely coincidental that a particular Kenyan tribe is completely saturating the Olympic marathon scene? (https://www.npr.org/sections/parallels/2013/11/01/241895965/how-one-kenyan-tribe-produces-the-worlds-best-runners). Is it just purely random that all of these Kenyans have black skin? If these Kenyans were to start breeding with Asians, do these Kenyan genetics suddenly disappear because they are no longer "pure?" Does not this bred child have Kenyan and Asian genetics?
Again, if we call various colours red, despite not all of them being pure, why do we treat various types of humans as being all the same race, even if not all of them being pure?
In any case, your conception of human genetics is extremely radical. Without races, you're implying that genetic expression is purely random, in that there is no consistency or rhyme to genetic expression (i.e. race). You'll no doubt deny this, but this is the alternative to denying racial reality.