How do I practice prototype theory?

The most direct way to practice prototype theory is through a focused exercise: Pick a category you use frequently — 'productive day,' 'good meeting,' 'useful tool,' or 'interesting person.' Write down the prototype: what does the most typical example look like? Then list three items that belong to the category but feel less typical. Arrange them from most to least prototypical. You've just made your implicit typicality gradient explicit — and you can now ask whether that gradient is serving you or distorting your judgment.

Common pitfall: Treating the prototype as the definition. When 'productive day' prototypically means 'eight hours of deep coding,' you start classifying days with difficult conversations, strategic planning, or mentoring as 'unproductive' — even when they created more value. The prototype becomes a filter that rejects valid members of the category.

This practice connects to Phase 12 (Classification and Typing) — building it as a repeatable habit compounds over time.