Comment by d--b
I have a friend who really got into studying people who buy into conspiracy theories.
His conclusion mostly is that cleverness does not shield you from believing falsehoods. These are 2 distincts properties of the mind. In fact, it's quite the opposite. Smart people are very good at finding causes that justify what they believe in.
The point is that there is a ton of things that we know that are in fact based on beliefs. Like: did I ever see an atom with my own eyes? Nope. Did I see a clock slow down because it flew in a rocket really fast? Nope. Did I ever check that the moon landing looked legit? Nope.
One of my favorites is the controversy about Q-tips, there are tons of people who say it's bad for your ears, and then there's a guy who did a study that concluded that no study ever proved that Q-tips were bad for your ears. I know Q-tips are probably bad for my ears, but they feel so good, so whenever my wife brings up that I should stop using them, I always refer her to that one guy who tried to prove that Q-tips weren't that bad.
Perhaps it's just user error, but if you compact the wax in your ear by shoving stuff into it then you'll be in for a world of pain when the doctor uses a watergun to uncompact it.