PSD.10:2 - Problem

A numerical estimate can hide the conditions under which it is meaningful. An access model may estimate arrival time only when the road is open; a training study may concern an immediate test rather than later Work; an AI evaluation may concern a previous version or operating distribution. Averaging the results does not repair their missing applicability.

Conversely, a demand for certainty can stop every useful return. Some uncertainty cannot change the ordering, while another can show that all alternatives fail a protected condition. A useful account distinguishes those cases. It also separates a question that better evidence can answer from a disagreement about values or authority that evidence alone cannot settle.