Willis and Todorov flashed unfamiliar faces for just 100 milliseconds. Snap judgments of trustworthiness, competence or likability were already very close to those made with unlimited time. Looking longer mostly made people more confident, without changing the verdict much. Beware: fast doesn't mean accurate, and these impressions are often wrong.
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.