In my opinion it's pretty clear dr. Amen was really only there to push a book. He was never really interested in having a real discussion anyway, hes just shilling. If you're going to be pushing a diagnostic method and supplements to solve issues without any proof whatsoever that's a problem. No one should be making statements about the efficacy of a technique without evidence. The fact that he got defensive about it speaks volumes about his character and what he hopes to get away with.