A quick war story from building inbox systems: the drafts were good. Tone right, structure right, customers helped. Except for one recurring disaster class — prices. A draft would quote a price from an old email thread the system had read, the human reviewer would be moving fast, and out went a number the business hadn’t charged in a year. The root cause wasn’t the AI. It was that the business’s prices lived in eleven places — a website, a PDF, someone’s memory, old threads — and the system grazed on all of them. The fix was boring and total: one canonical list. Prices, hours, policies, service areas — one document, owned by the business, updated in exactly one place. The drafting system reads only that document. Old threads became history, not sources. When a price changes, it changes in one spot, and every future draft is right. Review got faster too. When a reviewer knows the numbers could only have come from the canonical list, they stop re-verifying every figure and spend their attention on tone and fit — the things review is actually for. If your business’s key facts live in more than one place, which copy would your systems (or your team) quote — and is it the current one?