In 1973, Lionel Standing showed volunteers 10,000 photos for a few seconds each. Later, shown pairs of images, they picked the one they'd seen about 83% of the time. In 2008, an MIT team found memory for 2,500 objects was strikingly detailed: people could tell apart two very similar versions. Your visual memory is vastly bigger than you'd guess.
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.