Maybe we're so hardwired this way that without the training or discipline to counteract that native/naive tendency, it just takes over.
Well the human use of belief in modeling the world in which we act is a very important brain function and it's tied in to other brain functions so that capacity or vulnerablity exists but I think it is short of hardwiring.
I think the phenomenon is gullibility and obediance to leadership or what true believers call "faith". I recently read a book by Ann Rule called Everything She Ever Wanted about the crimes and sorry psychology of a sociopath. The thing that was hardest to understand was that her mother supported her and believed in her, finding ways to deny the evidence in order to maintain her "faith" in her daughter. This woman disowned and blamed her grand daughter because she cooperated with the district attorney's investigations of her mother's crimes. I cite this as an obviously extreme example that demonstrates how the human mind will function to maintain a cherished belief.
It is my observation that if a belief is emotionally important enough to an individual then there is no way to convince them otherwise. There are always rhetorical evasions that allow them to return to seeing things as they want to see them and the established religions of this world have had a lot longer to develop these rhetorical buttresses of their illogic than science has had to refuted them.
Religions have had much longer to evolve to fit and support and use human psychology than science has. Looking at it like that it becomes easier for me to understand why so many prefer religion to science.
The brain is vulnerable to delusion. Another example is the condition where people believe they are dead and bloodless. One case I read about a psychiatrist pricked the patient's fingers to produce a drop of blood. The patient did not respond by seeing through his delusion, but simply stated as evidence that he was correct that it was only a very little blood!
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