This guy keeps going DOWN the list, in terms of theological certainty.
First, he strongly implied the Roman Martyrology was infallible (which it isn't).
Then, he quotes canon law (which also isn't infallible).
Now, he's quoting theologians (who are far, far, FAR from infallible).
Just keep throwing spit balls at the wall, dude.
That approach doesn't work with dogma/theology. It may work in political debates, but not with the Faith, which has clearly defined tiers of Truth. BOD is part of the "non-dogma" tiers.