Concepts

ZUCR‑0

Every verifiable claim is backed by a source or reproducible computation. Non‑verifiable claims are flagged or refused.

Evidence Object

Claim‑ID, source span, URL, timestamp, hash, computation trace. Signed (ED25519) and stored in EU R2.

Risk classes

• A+ (critical): 2+ independent sources, human‑in‑the‑loop, refusal on doubt.
• B: primary source; cross‑check on conflict.
• C: primary source; clear disclaimers.

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