How so?
DNA.
www.are.na
No. It's, for the upteenth time, because evolution is a
vertical process which results in SUB species.
Meaning that one never outgrows its ancestry.
What you call "fish" in the ancestral lineage of humans, are actually
vertebrates that lived in the sea. Humans "remain" vertebrates. They were not "modern fish".
Salmons are not your ancestors.
So the descendants of finches, no matter how many millions of years into the future, will still remain withing the lineage of finches.
This has been explained to you so many times, it's not even funny that it still hasn't found its way into your brain.
So try to remember it this time:
IF FINCHES EVOLVED INTO NON-FINCHES, THEN EVOLUTION WOULD BE DISPROVEN