Psychologist Skinner has a famous paper pigeon superstition, which is an interesting experiment. Skinner put all eight pigeons in a cage, which automatically put pills every 15 seconds. No matter what pigeons do, every 15 seconds, the cage will automatically drop a pill.

After the experiment started, something interesting happened. Six pigeons showed obvious "superstitious" behavior. Skinner wrote in the report: a pigeon forms a conditioned reflex of counterclockwise rotation, usually rotating 2-3 times between two enhancements; Another pigeon repeatedly put its head into a corner above the box; The third showed a gesture, as if putting his head under an invisible pole and holding it up repeatedly. The head and body of the other two pigeons move like a pendulum, and one pigeon forms an incomplete pecking behavior.

Interesting phenomenon-animals, like humans, will establish causality in chronological order, or: in the face of the unknown, humans are just pigeons in clothes.