Rozenblit and Keil asked people to rate how well they understood zippers, flush toilets and locks. Ratings were high. Then they had to explain, step by step, how each one works. They got stuck, and their self-ratings dropped sharply. We mistake “I use it every day” for “I know how it works,” a trap called the illusion of explanatory depth.
Remembering is not replaying a recording — it is rebuilding. Each time you recall a memory, it becomes temporarily malleable and can be altered before being stored again. That is why two people can sincerely remember the same event… differently.
In 2003, Johnson and Goldstein compared European countries. Where you must tick a box to become a donor, consent rates ranged from 4% to 28%. Where you're a donor by default unless you opt out, they topped 85%. People aren't more generous on one side; most simply stick with whatever option was chosen for them.