Direct Answer
Humans are reliably bad at probability. We overweight low-probability events when they're vivid (long-shot parlays, lottery jackpots), underweight high-probability events that feel boring, and confuse independence with correlation across nearly every domain.
Key Takeaways
- Low-probability events feel more probable than they are.
- Independent outcomes are uncorrelated with prior outcomes.
- Progressive systems do not overcome house edge.
Low-probability overweighting
Prospect theory shows people overweight events around 1% probability. This is why lotteries sell, why 6-leg parlays sell, and why insurance markets work. In sports betting, the same overweighting funds bad parlay habits.
Independence is hard
Coin flips don't have memory. Roulette wheels don't have memory. Cards in a shoe do (slightly). Confusing the three is the entire foundation of progressive-betting systems, none of which beat negative-EV games.
Frequently asked questions
Why do streaks feel meaningful?+
Because human cognition evolved to detect patterns, including ones that don't exist.
Educational only. Not wagering, financial, or legal advice. See our editorial policy.