# CAIN-42 E19 limitations

- **NOT_IMPLEMENTED** -- In-process library exercised against a governed REFERENCE system (one digital agent, a vehicle abstraction, a drone abstraction, a collective and a human); no deployed fleet or customer agent
- **NOT_IMPLEMENTED** -- Vehicle, drone and robot control; physical safety guarantees
- **NOT_IMPLEMENTED** -- Hosted service: E19 is not wired into the production gateway
- **UNKNOWN** -- Semantic truth of beliefs, goals, predictions and outcomes (the fabric governs claims, it does not know the world)
- **UNKNOWN** -- Hardware attestation of agents, models or sensors
- **UNVERIFIED** -- Multi-host behaviour of E19 state (all measurements are single-host, in-process)
- **NOT_PERFORMED** -- Real-world adversarial validation and third-party review
- **UNVERIFIED** -- Proof signed with an ephemeral build key, not a production trust root