nx_grounding.nx

nx_grounding.nx -- EVIDENCE-TIER / ANTI-OVER-OPTIMISM rung. Every datum this ecosystem emits carries a grounding tier that says how much to trust it, and a composite claim is only as trustworthy as its WEAKEST input. This exists so the system stops presenting a number I typed from memory (a CPI score, a bulk price) with the same authority as a number two independent methods verified against published literature (a peptide mass). That conflation is the exact over-optimism this rung refuses to allow. THE TIERS, weakest to strongest: ATTESTED an operator DECLARED it done; the system cannot check it (e.g. "the cGMP facility is qualified"). Trust = the operator. ASSERTED a constant entered from domain knowledge with NO in-system external oracle (e.g. a CPI score, a bulk cost, a regulatory tier). Plausible, internally consistent, UNVERIFIED. A gate that checks the code returns this constant proves nothing about the constant's truth. DERIVED computed from stronger inputs by sound arithmetic, but not itself checked against an external reference (e.g. a peptide's isoelectric point, an ion m/z). As true as its inputs + the math. VALIDATED a model checked against PUBLISHED data points (e.g. the freezing curve vs Goff/Hartel; the z-value recovered from two legal schedules landing in the published band). ANCHORED verified by an INDEPENDENT second method AND external ground truth (e.g. a peptide mass: residue-sum == elemental-sum == published formula == published mass). The strongest claim. THE COMPOSITION LAW: a chain is as strong as its weakest link. An "effective manufacturing cost" that multiplies an ASSERTED bulk price by a DERIVED formula is ASSERTED, not DERIVED -- gnd_compose takes the MINIMUM. This is what stops a pile of asserted constants from laundering itself into a confident-looking result. gnd_is_verified draws the honest line: only VALIDATED and ANCHORED count as "verified". Everything the go-to-market / cost / regulatory layer emits is ASSERTED or below, and this function will say so -- in the machine output, not just in prose. genealogy_id: rigor + service_infrastructure + liar_killer