Spacing Drills Without Gamification

We distrust streak mechanics—they reward clicking, not thinking. Instead, participants log dates when they re-derived a bound from scratch without notes.

Spacing follows a quiet calendar: return after three days, then ten, then thirty. If a derivation fails, the calendar resets but without shame language—just a factual note in the margin.

The log doubles as interview prep evidence: you can point to dated doubling experiments when managers ask how you validate complexity claims.

We do not ship a mobile app; a paper grid keeps the ritual honest and away from notification noise.