An instrument for questioning intuition
Probability
Cabinet.
Small experiments in chance, strategy, and number patterns. Make a prediction, put it to the test, and inspect the reasoning.
Experiment 01 / A fair coin, an unfair raceH = heads · T = tails
Penney’s Game
Two patterns. One coin. Which sequence will appear first?
Player 1
HHT
Player 2
THH
The coin trail0 flips · last 24 shown
Make a prediction, then flip the coin.
Every game ends at the first matching pattern.
Batch runs start fresh. Changing either sequence resets the results.
The evidence0 completed games
Observed · Player 2No trials yet
Theoretical · Player 275.0%
Player 1: 0 wins · Player 2: 0 wins. Simulations fluctuate; theory describes the long-run probability.