How do I practice predictive testing?

The most direct way to practice predictive testing is through a focused exercise: Select one schema you currently hold about a person, a system, or a recurring situation. Write down three specific, observable predictions that this schema implies. Be concrete: what will happen, when, under what conditions. Then observe. Over the next week, track which predictions are confirmed, which are disconfirmed, and which you cannot evaluate. At the end of the week, score your schema: did it predict well, poorly, or ambiguously? If it predicted poorly, what does the pattern of failures tell you about where your model is off?

Common pitfall: Generating only predictions your schema cannot fail. This is the confirmation trap applied to prediction: you unconsciously choose predictions that are so vague or so likely to come true regardless that they cannot disconfirm your model. "I predict she will say something in the meeting" is not a test. "I predict she will raise an objection to the timeline within the first ten minutes" is. The failure mode is not making predictions — it is making safe ones. A prediction that cannot be wrong cannot teach you anything.

This practice connects to Phase 15 (Schema Validation) — building it as a repeatable habit compounds over time.