The trust layer
Someone has to say it is true
Anyone can save an answer. Only an administrator can vouch for one. That asymmetry is the feature.
Why the asymmetry matters
Without it, every saved number drifts towards looking official, and the word trusted stops carrying information.
A vouched-for fact teaches the system how your business asks its questions. It never answers on its own -- because a fact confirmed in error would then be repeated identically forever, and the only way to notice would be for someone to read the query.