Researchers asked students to walk into a room wearing an embarrassing T-shirt. The wearers guessed that about half of the people present would notice it. In reality, only around a quarter did. Psychologists call this the spotlight effect: you're the center of your own attention, but much less of everyone else's.
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.