Every product manager eventually faces a roadmap that looks coherent on paper but feels wrong in the room — the features are justified, the metrics are defensible, yet something is off. The 11th-century Persian philosopher-scientist Al-Biruni noticed the same tension in cartography: a map that perfectly represents known data can still misrepresent the territory if the surveyor never questioned which data was worth measuring in the first place. He called this the problem of the *qiyas* — analogical inference — being applied before the underlying categories were examined. The trap in product work isn't bad prioritization; it's that you've been faithfully optimizing a model that was quietly built on unexamined category choices. Which users count as 'users'? Which behavior counts as 'engagement'? These aren't neutral. Today, before you refine anything, ask: what is one category in my current model that I inherited rather than chose?

Pick one metric your team treats as settled. Who decided that *this* behavior — not a dozen other possible ones — is what that metric should capture, and when did that decision stop being visible?

Drawing from Islamic Historical Philosophy (Al-Birunian empiricism) — Al-Biruni (Kitab al-Qanun al-Masudi / Canon of Masud, c. 1030 CE)