Scott Alexander in Astral Codex Ten:
Reading between the lines, I think she learned pretty much the same thing a lot of the rest of us learned during the grim years of the last decade. Of the fifty-odd biases discovered by Kahneman, Tversky, and their successors, forty-nine are cute quirks, and one is destroying civilization. This last one is confirmation bias – our tendency to interpret evidence as confirming our pre-existing beliefs instead of changing our minds. This is the bias that explains why your political opponents continue to be your political opponents, instead of converting to your obviously superior beliefs. And so on to religion, pseudoscience, and all the other scourges of the intellectual world.
But she also learned that just telling people “Hey, avoid confirmation bias!” doesn’t work, even if you explain things very well and give lots of examples. What does work?
More here.