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Vol. I · No. 251
Mon · 8 Jun
A Daily Lexicon of Trustworthy Data
Vol. I · No. 245 · 23 May 2026

Every AI accuracy problem we opened this week was a governance problem in costume.

Ironic subject line on file: “Model Grounded In Undefined Data Is Now Confidently Wrong, With Citations

Editor’s note

Retrieval-augmented generation was supposed to make the model accurate by feeding it your documents. It turns out the accuracy lives in the documents — in whether they are current, owned, and consistent — which is a data-quality program no one scoped before the demo. The companion story is lineage: required for the audit, present in the slide, partial in the warehouse, and absent the moment the number leaves it. The thread is that AI does not retire governance debt; it draws interest on it, then asks why the statements don't reconcile.

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Before the model can be trusted, the data has to be — and trust is a decision someone signs, not a feature you enable.