Quote:
Originally Posted by L0LWAT
I think you're onto something here!!! It's because skin color has nothing to do with intelligence. It's nurture, not nature -- just like all science demonstrates.
You pointed it out yourself. Now stop bending over backwards to justify being racist.
It's selection among nature variability.
If you take the fastest horses of a very very very large group of horses, the average speed of the original horses won't matter much, the selected horses will still be very fast, purely for genetic reasons, you just took the best specimen (for that trait).
And it's inheritable so their offsprings will be faster on average than the offsprings of the other horses, although there is mean reversion so on average the offspring will be slower than the originally selected super -quick horses.
If you understand why it works for speed in horses, then you can understand it works for any inheritable trait of any living species when you select non random samples of a group.
And all behavioural traits are at least partially inheritable in all mammals.
Notice how this works even if you start with two identical groups (wrt genetical makeup), you end up with different genetical groups after selection sorting over time.
Tldr: the brain drain does create a different, unique, new population with different median traits and different genetical pool than the original population.
And the same is true for immigration predicated on different selection methods