In 2015, a photo of a dress set the internet on fire. Among 1,401 people tested by researchers, 57% saw it as blue and black, 30% as white and gold. The image is ambiguous about lighting: if your brain assumes bluish light, it subtracts it and sees white and gold; assume warm light and you see blue and black. Color is an interpretation.
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.