This was already linked in Steven Jones' blog, re-posting because it should be widely read, IMO. -r.

Faulty Towers of Belief: Part I.
Demolishing the Iconic Psychological Barriers to 9/11 Truth

http://www.journalof911studies.com/

By
Laurie A. Manwell
B.Sc. Biology and Psychology, University of Waterloo
M.Sc. Biology (Molecular, Cellular, Developmental) University of Waterloo
Ph.D. Candidate Behavioral Neuroscience, University of Guelph

"It is as hard for the good to suspect evil, as it is for the evil to suspect good."
- Marcus Tullius Cicero, Statesman, orator, writer (106-43 BCE)

"If only there were evil people somewhere, insidiously committing evil deeds, and it were necessary only to separate them from the rest of us and destroy them. But the line between good and evil cuts through the heart of every human being. And who is willing to destroy a piece of his own heart?"
- Aleksander Solzhenitsyn, The Gulag Archipelago

"When I despair, I remember that all through history, the way of truth and love has always won. There have been murderers and tyrants, and for a time they can seem invincible. But in the end they always fall. Think of it, always"
-Mohandas Karamchand Gandhi, Political and spiritual leader (1869-1948)

Imagine for a moment that you are trying to discuss the 9/11 truth movement with a family member, friend, or even a colleague, and are met with remarkable resistance (of course if you are reading this, you most likely do not need to use your imagination). On the rare occasion, perhaps you’ve heard, "Hmm, that’s interesting, tell me more." More likely though, merely the mention of alternative theories of the events has of 9/11 drawn dismissal, joking, or even ire: "I don’t listen to conspiracy theories," "Yeah I’ve heard some really crazy stories that the government did it," or "How dare you mock the victims of 9/11!" You begin to wonder, why are some people less willing to examine all of the events of 9/11 than others? Is it really because they are obstinate or in denial? Is it because they are apathetic or judiciously lazy? Or perhaps is it because they are uninformed or purposely misinformed? Are there any other explanations? These are all very important questions to be explored if all of the properly investigated facts and evidence of 9/11 are ever going to reach the forefront of public consciousness.