Asch conformity experiments show about 37% of people can be convinced to give consistently wrong answers if enough people around them give wrong answers first.
That's more than 1 in 3, and this is where the answer is obvious and right in front of the test subject that they can visually confirm right there and then.
When you have every form of media screaming the wrong answers at people constantly and it's about things that aren't immediately obvious, can you really be surprised that only the most stubborn and prideful, or those most directly exposed to the truth can continue to give the right answer in any significant quantity?
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