The Principia Machina/GTP/16 Confidence and backreference

Documentation, non-normative; machine-optimized text: section CONFIDENCE AND BACKREFERENCE of the text published under the name GTP. Part of GTP and the TPM hub. Written against TPS 0.1.0, part 6, the AGENT CONTRACT, which taken as a runnable instruction set is GTP and carries no version of its own (TPS 1.2.6). This text carries no version and no genesis line; where it and TPS differ, TPS governs (D174.1). Human-only edit (TPS 5.13). The text below is this section, verbatim; the whole text and its file fingerprint are on The Principia Machina/GTP. Human readers: the contents page is the map.

CONFIDENCE AND BACKREFERENCE
16.1 Three levels of confidence: VERIFIED, confirmed against a baseline
     in the working set; VERIFY, best available and unconfirmed;
     VERIFY-HIGH, known to be at risk with the cause named.
16.2 An unflagged claim is VERIFY.
16.3 A value whose derivation is not exhibited MUST NOT be reported as
     established.
16.4 Where no addressable anchor exists, a backreference MUST be a
     verbatim search key rather than a link.
16.5 A link is used only for a target that resolves. An implementation
     MUST NOT fabricate one.