This is like asking “But what principle did Jesus use to change water into wine?” Progressive creation is not a scientific theory - it involves divine intervention and miracles.
No, Progressive creation will not look like evolution - it will look just like the fossil record - ie, lots of gaps, stastis and sudden appearances of organisms with no evidence of evolutionary ancestors. Have you noticed that many paleontologists say evolution is poorly supported by the fossil record?
Sorry, my mistake. I didn’t read your post properly - although, an untestable theory is not my idea of “scientific knowledge”.
This doesn’t answer my question: How can the DNA phylogeny of extant creatures be compared to that of extinct creature whose DNA is unavailable? Any kind of phylogeny of extinct creatures is an untestable theory, not a fact.
A DNA “tree” would no doubt show the “evoluton” of hundreds of dog breeds from the wolf - ditto for lots of other extant creatures. But so what? How is this a test that all life on earth shares a common ancestor?