I think of myself as relatively intelligent, so I was merely pointing out that reading about AIDS-denial by Kary Mullis was not "positively crazy".

Reading about it isn't "positively crazy," nor would it necessarily be to believe it given no other sources of information, but that doesn't mean it didn't take a fair amount of craziness for him to develop that position in the first place, considering how much selective interpretation of the evidence available to him it required.