"First, our communities expose us to disproportionate support for our
own ideas. Second, they shield us from the disagreement of
outsiders. Third, they cause us to disregard whatever outside
disagreement we encounter. Finally, they squash the development of
disagreement from within. These factors create a kind of societal
counterpart to cognition's confirmation bias, and they provoke the
same problem. Whatever the other virtues of our communities, they
are dangerously effective at bolstering our conviction that we are
right and shielding us from the possibility that we are wrong."
Kathryn Schultz, Being Wrong, 2010. HarperCollins, p 149.
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