Use your free will

Press D or F as randomly as you can. Scott Aaronson reported 70–80% accuracy against most people; one student held it to chance: “I just used my free will.”

5-gram

Longer memory can catch longer habits, but needs more repeats. Changing it replays and rescores this sequence.

predictor accuracy

—

0 correct 0 predictions

Cumulative accuracy 50 chance · 70 typical waiting for data
Cumulative prediction accuracy No scored predictions yet.
How the n-gram works · learn more

An n-gram is a sequence of n recent inputs. Here, n is 5: the predictor counts whether D or F followed each matching sequence before, then guesses the more common result. New patterns back off to shorter ones.

N-gram chapter · Aaronson Oracle source · guesses are made before each press and stay in this tab.