mental models

are the internal lenses through which we interpret situations, predict outcomes, and decide what to remember—and their real value lies less in describing reality than in replacing our default, often misleading intuitions with frames that actually hold up under pressure. The strongest ones are singular and concrete enough to be recalled in the moment, whether that's reframing CPR as buying time instead of saving lives, or pinning "don't be like Jack" to a story rather than a citation. A mental model's durability is best judged by whether it surfaces unprompted across unrelated domains—when the same frame keeps showing up in different conversations, it's graduated from borrowed concept to operating tool. Equally important is what mental models are not: they shouldn't be split across competing slots in our attention, and they shouldn't be mistaken for facts when they're really simplifications with known blind spots. In practice, building better mental models means watching for surprise, tracking which frames recur, and consciously separating the