Name any date, even a distant one, and they can tell you the day of the week and what they did. The first case, an American woman named Jill Price, was described in 2006 by James McGaugh's team, which has since identified only about sixty such people. Yet these extraordinary memories are no better at learning word lists, and a 2013 study found they form false memories as easily as anyone else.
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.