You are very argumentative, aren't you.
Well, this IS a debate forum.
You seem to think that using the word "fact" somehow strengthens your views.
Well, it does. Facts are stronger then opinions.
And DNA testing to determine kinship is a thing that deals with factual information and draws factual conclusions.
Factual enough for courts to determine that some kid is your actual kid and force you to pay alimentation, for example. Factual enough for courts to assign inheritances.
Who is claiming that DNA can't be used to determine kinship?
You. You denied that it is a genetic fact that species share ancestry. When I explained it, you denied it further trying to brush it off as "just some belief" or "guess".
Either we can test for kinship and ancestry or we can't.
However, you wish to extrapolate a few billion years into the past and claim that it is identical
See? Here you are again.
There is no extrapolation. If you actually bothered to read and acknowledge / understand those 15 sentences a few posts back in which I explained to you
how and why we are able to do this, you would understand that there is no "extrapolation" going on.
It's the exact underlying principles.
You inherit genetic markers from your parents that your cousins don't have as they aren't off spring of your parents. So when we test a random person and that person has those markers, that's how we know that that person is actually your sibling.
Whenever we compare DNA from multiple individuals, we know that those who share markers, share an ancestor. And when we map this out by sequences
entire genomes, then we get a
phylogenetic tree. A
tree. Exactly what we
should get if evolution occurred and species share ancestry.
We find this in active DNA, in inactive DNA, when tracking single genes, when tracking specific DNA sequences, when tracking specific markers like ERV's,.... we always get the same tree.
A family tree.
This is how we can determine kinship and common ancestry. There is no such thing as a "species barrier" like creationists like to lie about.
I dismiss such claims as unknowable.
...for no other reason then it being in conflict with your a priori faith based religious beliefs.
That, and clearly good ol' willful ignorance of the subject.
Furthermore, it makes no difference to me one way or the other.
Apparently it does... why else would you go so out of your way to avoid acknowledging simple points, handwave points away with no explanation whatsoever, pretend that there is a link between biology and "atheism", etc etc etc?
If it makes no difference to you, then why resist these basic evolution 101 points so strongly?