"It is primarily the application of data gathered from the evolution of extant populations to explain the nature of the fossil record. Not the other way around."
Let's back up, and maybe we can arrive at some agreement. However PE came about, the relevant point here is understanding what it is, and here we agree. It is an application of the fossil record, correct?
Now, if that came about originally due to an application of other areas of researcg, that is fine, and doesn't change anything. The key here is that I posted about what PE says about the fossil record, and nothing you are saying contradicts that.
Agreed?
In the future, let's focus on reality. If you want to state that PE was for paleontologists, at least acknowledge that this has no bearing at all on what I am stating about PE.
PE is still an application of the fossil record to evolutionary theory. If it came about by using ideas in evolutionary theory already to come up with a way to incorporate the fossil record, that doesn't negate what PE is.
It does strengthen a point I have had all along about evolutionary theorists in general. They basically, as you admit, disregarded the fossil record as too incomplete because it didn't fit into the old models of evolutionary theory, but when evolutionary theory could somehow be shown to explain the fossil record, at least in part, all of the sudden they had an audience. What this tells me is that they do not consider any data that would contradict the basic assumptions of evolutionary theory.