What is falsification?

Falsification is a concept in personal epistemology: Actively looking for evidence against your current belief is the fastest path to calibration.

Example: You believe your startup's churn is caused by poor onboarding. Instead of gathering more data about onboarding friction (which would confirm what you already suspect), you deliberately investigate the three strongest alternative explanations: pricing misalignment, feature gaps, and support response time. You discover that 68% of churned users never opened a support ticket — they left because a competitor launched a feature you deprioritized. The disconfirming evidence didn't just correct your belief. It changed your roadmap.

This concept is part of Phase 8 (Perceptual Calibration) in the How to Think curriculum, which builds the epistemic infrastructure for perceptual calibration.