So is common descent. So is the fauna of the Devonian.
He was convinced of what he was saying but he agreed that since we couldn't test and verify the hypothesis there was no way he could draw an absolute conclusion.
I'm not going to bat for anonymous Princeton physicists. You can still get your hammer and chisel and go check out Devonian strata for yourself. Or not. I have. But don't give me 'unverifiable, unreproducible' when the only impediment is an unwillingness to go see for yourself.