>cognitive dissonance sensors
also helps to remind people that most things would sound ridiculous to them if they were hearing them for the first time:
China foot binding: for 1000 years families routinely crushed the bones in their healthy children's feet, over and over till the bones could no longer heal and their kids were disabled for life. If you had never heard that before, would you believe it? Absurd, right? Impossible.
Snow: This thing that appears out of thin air, piles up and becomes so heavy it can block a door, even a car is not strong enough to plow thru it if there's a lot. If you had never heard of snow, would you believe that ridiculous tale?
Bacteria: There are these invisible demons powerful enough to kill a human being. But a person can take the anti-demon medicine (antibiotics) and then the demons vanish and the person is magically healed. Nonsense, right?