有时，人们持有一种根深蒂固的核心理念。当面对与该理念相悖的证据时，他们无法接受这些新证据，因为这会引发一种极度不适的感觉，即“认知失调”。为了维护这一核心理念，他们会为任何不符合该理念的事物寻找合理化解释，对其视而不见，甚至全盘否认。

Sometimes people hold a core belief that is very strong. When they are presented with evidence that works against that belief, the new evidence cannot be accepted. It would create a feeling that is extremely uncomfortable, called cognitive dissonance. And because it is so important to protect the core belief, they will rationalize, ignore and even deny anything that doesn't fit in with the core belief.
Frantz Fanon （psychiatrist）