"The most difficult subjects can be explained to even the most slow-witted man, if he has not formed any fixed idea of them already, but the simplest most obvious thing cannot even be made clear to the most intelligent man, if he is firmly persuaded that he knows already, without a shadow of a doubt, what is laid before him". - Leo Tolstoy, 1897
"We want the facts to fit the preconceptions. When they don't fit it is easier to ignore the facts than to change the preconceptions." --Jessamyn West