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All I see is one big circular “begging the question”.
You’re assuming evolution, so all the evidence viewed through that lens, of course, supports your assumption.

Also, you’re misrepresenting my viewpoint on adaptation, perhaps a purposeful misreading in order to bat down the strawman? I have no belief that adaptation happens on an individual basis.

Of course, with your evolutionist assumptions, the ideas of the “races” from a creationist point of view is baffling, because the evolutionist assumption WRT “race” is upside down. The original humans (and Noah) had all the information necessary in their DNA to produce the variations you see in the “races” worldwide. When the people groups became isolated, the interbreeding eventually lost the ability to produce other traits seen in other people groups in other locations. Think of hybrid crosses where eventually all the recessive or all the dominant genes get weeded out.

You really didn’t seem to understand my answer, either, since I was quoting and addressing your questions, and you were answering your questions as well.

It must be noted that you've yet again failed to answer one of my simple questions. In lieu of that, you've chosen to toss about the terms you learned in philosophy 101 yet again.

(I'll readily admit, you would kick my ass in philosophy 101... which of course has no bearing on biology 101.)

You’re assuming evolution...

Not really, not for the purpose of my question re: adaptation/speciation.

So let's say we agree that there is no such thing as evolution. But, as you admit, there IS something called adaptation. In fact, this is the imaginary world you live in, isn't it? Adaptation but no speciation - right?

Ok. So... In that world, what causes adaptation? Why do you see adaptations? What is the mechanism for those adaptations? Why do species adapt? Surely you've thought of this and have answers.

And while you're thinking about that, please think about the follow-on question which is what I originally asked: What stops these adaptations from continuing and becoming more pronounced over many generations? What is the biological mechanism that puts the brakes on and says, in effect, "hey! Whoa there! Stop adapting or you'll become a tad too different from that population of you across that river!"

As for your explanation of how human races came about, I'll leave that for another day. After all, you hyper-fast "hybridization" hypothesis requires dna changes occurring many magnitudes faster than any scientist would propose.