Psychologist Peter Wason told people the sequence 2-4-6 followed a hidden rule they could discover by proposing other triples. They tried 8-10-12, 20-22-24… and declared “even numbers going up by two.” Wrong: the rule was simply “any ascending numbers.” Fewer than a quarter got it right first time, because we test ideas by confirming them, not by trying to break them.
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.