His epistemological tools do not lead him even close to the truth, so you can assume he is wrong about everything.
Like I said before, the scientific method is the best tool we have, anything else can easily lead you to mental masturbation or worse, delusion or schizophrenic episodes. You know the I am the prophet, I have found the light type of conditions.
Translation: His arguments lead to conclusions that falsify what I have arbitrarily and subjectively defined as "truth" so I am going to assume he is wrong about everything and stop thinking about his arguments.