Where the optic nerve leaves the retina, there are no light receptors at all: the blind spot. In your field of view, it covers an area wider than about ten full moons side by side. You never notice it because the other eye compensates and your brain fills the gap with surrounding colors and patterns. Part of what you see is literally made up.
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.