Debugging a Confident Wrong Answer

Yesterday the pricing team changed the refund window from 30 to 14 days and updated the help-centre article. Today the assistant is still telling customers "you can request a refund within 30 days" — with a citation. Walk through how you would diagnose this using the traces you have, list the likely root causes in the order you would check them, and say what you would change so this class of failure is caught before customers see it.