Students discover how auditory illusions are based on confounding assumptions and patterns.
After repeating P-O-T-S several times, most people will say "Stop" because their brains have been "primed" by the letters P-O-T-S.
The human brain is so good at finding patterns that it recognizes POTS as being the reverse spelling of STOP. The brain relates it to our behaviour at a traffic light, all before our conscious mind can catch up.