I think we have a few evolutionary glitches that if exploited, make us vulerable. Just like our inefficient and hazardous swallowing mechanism, we have cognitive feedback loops that prevent us from seeing a glaring error right in front of us.
Consider the very popular novel, the Da Vinci Code, by Dan Brown. Mr. Brown used a little literary deception in his foreward, "The Priory of Sion – a European secret society founded in 1099 – is a real organization". The author also claimed in his book that "all descriptions of artwork, architecture, documents ... and secret rituals in this novel are accurate" - Wikipedia
I had a congregation member asked me in hushed tones, was it all true? I dismissed it right away. But how hard would it be to back up my assertion with facts, without a compelling story to go with it? Mr. Brown used his audience, taking advantage of a common brain glitch.