Usually when amateurs disagree with the experts it is based on the ignorance and naivete of the amateurs. When confronted with expert opinion, the real crank will then claim a conspiracy. They disagree with me because there is a vast conspiracy to trick the public about this issue. Or they will simply assume that the experts collectively are closed-minded, and lack their brilliant insight. The explanation is usually far simpler. If you disagree with the experts the chances are overwhelming you just don’t know what you are talking about.
Steven Novella