How about comparing the credentials of Einstein and Van Flandern (which is what this discussion is about). The former is, along with Newton, one of the two most brilliant physicists to have ever lived; the latter is a fringer (to put it kindly) who believes that certain features on the surface of Mars are sculptures of "faces" created by extra-terrestrial beings, and that the asteroid belt was created by an exploding planet. Van Flandern's views haven't found acceptance
anywhere within the scientific community. (And no, the "scientists" interviewed on the Art Bell show don't qualify).
Einstein's theories (especially General Relativity) have passed rigorous test after rigorous test for close to a century.