What it is though, is the circular logic where one theory is presented as fact to prove another and then the second is used as proof for the first."
There's nothing "circular" or even "theoretical" about DNA testing & profiling -- it's used in law to establish paternity, prove innocence of crimes or association, etc.
But DNA analysis comparing various species to each other is based on theoretical assumptions of evolution, that for example, the better the match-ups of alleles, the more closely related are the species.
A recent surprising example was learning that Neanderthals, far from being a distantly related genus (like Indian & African elephants) were instead our own more closely related "kissing cousins".
Bryanw92: "This is 'Settled Science' or 'Consensus Science'. "
Strictly defined no science is ever 100% "settled" since every observation and theory can be overturned by better observations and better explanations.
Only in politics does science become a club to be used by one partisan side against any others.
Scientists themselves are never (or at least should never be) confused about the distinctions between actual observations (aka "facts"), hypothetical explanations (falsifiable but not confirmed) and seriously confirmed theories.
For examples:
- Ideas known as "Panspermia" can be theoretically falsifiable hypotheses.
- Basic Darwinian evolution is a strongly confirmed theory built on many observed facts.
"Anthropogenic climate change" is just one example of science corrupted by politics, there are others, all unfortunate.
Evolution theory is not one of them.