Ibn Khaldun, the 14th-century Arab historian, noticed something strange about expert knowledge: the more deeply a scholar mastered one civilization's assumptions, the less capable they became of recognizing a different civilization as equally coherent. Expertise and blindness grew together. The same dynamic lives inside every mental model you've internalized. A model that has served you reliably becomes invisible — not a lens you're looking through, but the eye itself. You stop applying it consciously and start living inside it, which means it can no longer be questioned, only enforced. The practical move isn't to discard your best models — it's to periodically treat them as hypotheses you're still testing rather than conclusions you've already reached. Notice today where a familiar framework is producing the same answer regardless of what the new situation actually contains.

If you stripped away the model you use most automatically, what would you actually see in a situation you faced this week — and what might you have missed by seeing through it instead?

Drawing from Islamic Philosophy / Philosophy of History — Ibn Khaldun