In mid-July 1962, 23-year-old French caver Michel Siffre settled alone on an underground glacier in the Scarasson chasm in the Alps, with no watch and no daylight. He phoned his team each time he woke, ate or went to sleep. When they told him the experiment was over, in mid-September, he believed it was August 20. Cut off from any time cues, he had lost nearly a month without noticing.
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.