ERVs conclusively demonstrate that humans and chimps had a common ancestor that was neither human nor chimp.Not according to Hugh Ross's publication, which is scientifically rigorous:
Dr. Finlay asserted this [ERV progenitor] as staggering and incontrovertible evidence for common descent; and taken with his presuppositions, he is absolutely correct. However, his presuppositions are many and, although plausible, they may not be as solid as he or other neo-Darwinian evolutionists think. ....
... 18 independent ERV infection events with similar insertion site specificities offer simpler viable explanations for ERVs that do not track with phylogenetic predictions based on NHP species relatedness. The Reasons to Believe model of common design also offers a simpler explanation for the possibility of multiple ERVs that do not follow primate phylogenetic trees: They serve relevant functions and are not evolutionary artifacts.
Questioning Evolutionary Presuppositions about Endogenous Retroviruses
The musings of a Christian apologist astrophysicist on the subject of evolution interest me not at all. Had you any intellectual honesty they wouldn’t interest you either