Cast, Not Carved · claim GEO-C575 · Observation rung · Methodological critiques
The Nash et al. 2020 Stonehenge provenance chain (PXRF + ICP-MS) matched Stone-58 to West Woods but cannot in principle distinguish transported natural sarsen from sarsen cast using crushed West Woods material, because the methods are blind to hydrogen, carbon, and oxygen.
source anchor
Fóti Appendix, p ~370; Nash et al. (2020), Science Advances 6(31):eabc0133
independence group: provenance-method-critique — related extractions in this group are not independent evidence
Evidence
No evidence records attached yet — this claim is held on its source anchor alone: the ledger knows where the proposition is stated and has admitted no observation behind it. A source is not evidence.
an honest empty state
This claim is in the ledger but not in the current edition's featured set. Nothing here has been assessed — that absence is information, not an oversight.
Still missing: plain-language gloss, credibility assessment, diagnosticity assessment, strongest objection, what would change our mind. A claim gains them when an edition features it and the edition's adopted assessment supplies the full treatment — a decision the panel reviews, not a field anyone flips.