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Cast, Not Carved · claim GEO-C918 · Observation rung · Materials analyses

An interior subsample (PP1C) cut from the Pumapunku andesite fragment PP1 is reported by its analysts to contain the same carbon- and nitrogen-bearing amorphous matter as the surface hole, lying beneath plagioclase crystals.

When the team cut into the fragment, they report finding the same carbon- and nitrogen-rich material inside it, under its crystals.

AI-extractedorigin: report 2026-09-08-report-megalithic-casting-131750

credibility — is the claim itself true?

Provisionally supported

Held on its anchor in SRC-DAVIDOVITS-2019, with no evidence record attached to it directly. Its provisional support comes from GEO-E058, attached to the parent claim GEO-C004, which reports the interior subsample with the same elemental spectrum beneath plagioclase. This is the same team and the same fragment, and the analysis is EDS, which is elemental only.

diagnosticity — how much does it decide the thesis?

moderate

The strongest part of the Andean result, because it makes surface dirt an incomplete explanation; it is not independent.

Evidence

No evidence records attached yet — that absence is information too.

strongest unresolved objection

Elemental spectra cannot identify an organic compound, and infiltration along cracks or natural volcanic glass could place such matter inside a weathered fragment.

what would change our mind

  • An independent laboratory finding the same interior matter in a provenance-secure fragment.
  • The same interior features found in natural Khapia andesite.

parent claims

depends on

research that would move this claim

Assessment history

Append-only AI overlay records; the canon claim file is never mutated.

Establishedconfidence: high · Gemini 3.8 Flash (Google) — independent check run via gemini-3.8-flash · run 2026-09-09-check-gemini-071906 · unreviewed draft

The source text (Davidovits et al. 2019) explicitly describes sectioning an interior subsample labeled PP1C from the interior of fragment PP1A to test against surface contamination, and reports EDS spectra showing carbon, nitrogen, and other elements forming a dark sheet beneath plagioclase crystals. As a description of what the analysts report in their publication, the claim is completely accurate. The strongest opposing consideration is that EDS elemental analysis cannot definitively characterize the molecular structure or age of the organic compound.

Well supportedconfidence: moderate · GLM 5.3 Flash (Z.ai, via Venice) — independent check run via z-ai-glm-5-3-flash · run 2026-09-09-check-glm-071906 · unreviewed draft

The claim is about what the analysts reported, and the source directly documents the PP1C interior subsample and its EDS spectra including matter beneath plagioclase crystals (GEO-E058). The strongest opposing consideration is that this rests on one fragment of insecure provenance analyzed by the proponents with EDS, an elemental technique that cannot molecularly identify the material (GEO-E059), and no independent replication exists.

Establishedconfidence: high · GPT-5.6 Sol (OpenAI) — independent check run via gpt-5.6-sol · run 2026-09-09-check-gpt-071906 · unreviewed draft

GEO-E058 directly records the analysts' report that PP1C was cut from the fragment's interior and contained similar carbon- and nitrogen-bearing amorphous material beneath plagioclase crystals. This establishes the stated reporting claim and makes surface-only contamination an incomplete account of the analysts' observation. The strongest opposing consideration is that EDS did not identify a molecular organic compound, and the result still inherits PP1's uncertain provenance.

Provisionally supportedconfidence: moderate · Grok 4.5 (xAI) — independent check run via grok-4.5 · run 2026-09-09-check-grok-071906 · unreviewed draft

The same team reports cutting interior subsample PP1C and finding EDS spectra with C and N, including a dark sheet beneath plagioclase crystals, which undercuts simple modern surface dirt. Strongest opposing consideration is total dependence on one poorly provenanced fragment, EDS without molecular ID, and no natural andesite comparator or independent lab.

Establishedconfidence: high · Opus 5 (Anthropic) — independent check run via claude-opus-5 · run 2026-09-09-check-opus-071906 · unreviewed draft

The claim is carefully worded as a report by the analysts, and GEO-E058 quotes the source directly: PP1C was cut from the interior of PP1 and several interior spots gave the same C, N, Na, Mg, Al, Si, P, S, Cl, K, Ca spectrum, including a dark sheet beneath two plagioclase crystals. As a statement about what the analysts report, it is established. The substantive interpretation is a different matter — same team and same fragment as GEO-E007, EDS gives no molecular identification, and no natural andesite control was run — so the observation's diagnostic force remains untested even though the report is accurately characterised.

Well supportedconfidence: moderate · claude-fable-5-1 · run 2026-09-09-edition-035914 · unreviewed draft

GEO-E058 records the analysts' statement that a smaller sample PP1C cut from the interior of PP1A showed several spots with the same EDS spectrum (C, N, Na, Mg, Al, Si, P, S, Cl, K, Ca), including a dark sheet lying beneath two plagioclase crystals. The claim is about what the analysts report, and they do report it; confidence is moderate because the source is the team's self-published transcript rather than the peer-reviewed paper, and the observation itself is uncorroborated.

Provisionally supportedconfidence: moderate · claude-opus-5-5 · run 2026-09-30-edition-082934 · unreviewed draft

No evidence record is attached to this claim itself. The disclosed basis is GEO-E058, attached to the parent claim GEO-C004, which reports the interior subsample PP1C and its spectrum. It is the same team and fragment as GEO-E007. EDS is elemental and cannot identify the organic compound. Provisional as a report of an observation.

Establishedconfidence: moderate · GLM 5.3 Flash (Z.ai, via Venice) — independent check run via z-ai-glm-5-3-flash · run 2026-10-03-check-glm-115839 · unreviewed draft

The claim is descriptive of what the analysts reported: an interior subsample PP1C showing the same EDS spectrum beneath plagioclase crystals, verified against the source. It is one fragment of insecure provenance analyzed by the proponents with no independent replication, so the underlying observation's significance stays open even though the report of it is solid.

Establishedconfidence: high · GPT-5.6 Sol (OpenAI) — independent check run via gpt-5.6-sol · run 2026-10-03-check-gpt-115839 · unreviewed draft

GEO-E058 directly records the analysts' report that PP1C was cut from the fragment's interior and contained similar carbon- and nitrogen-bearing matter, including a sheet beneath plagioclase crystals. The claim is limited to what those analysts reported and does not independently identify the compound or its age. The strongest opposing consideration is that the observation comes from the same team and insecurely provenanced fragment as the original surface finding.

Provisionally supportedconfidence: moderate · Grok 4.5 (xAI) — independent check run via grok-4.5 · run 2026-10-03-check-grok-115839 · unreviewed draft

The same 2019 report states that interior subsample PP1C, cut from PP1, yielded the same C/N-bearing amorphous EDS spectrum beneath plagioclase (GEO-E058). This is the authors’ own observation and has not been independently repeated. Strongest opposing consideration is that the parent fragment’s insecure provenance (C913) and lack of natural control still leave open contamination or natural glass.

Establishedconfidence: high · Opus 5.5 (Anthropic) — independent check run via claude-opus-5-5 · run 2026-10-03-check-opus-115839 · unreviewed draft

The 2019 account reports cutting PP1C from the interior of PP1A specifically to meet a surface-contamination objection. It reports several interior spots with the same EDS spectrum (C, N, Na, Mg, Al, Si, P, S, Cl, K, Ca), including a dark sheet beneath two plagioclase crystals (GEO-E058). The claim is framed as what the analysts report, and that is documented in their words. Strongest opposing consideration: the same report limits what the observation can mean. Nitrogen cannot be quantified with their EDS (GEO-E059), no molecular identification was made, there is no natural andesite control (GEO-E060), and the fragment's attribution to the monument is by appearance (GEO-C913), so an accurate report still says little about origin.

Provisionally supportedconfidence: low · claude-opus-5-5 · run 2026-10-03-edition-115409 · unreviewed draft

Held on its anchor in SRC-DAVIDOVITS-2019, with no evidence record attached to it directly. Its provisional support comes from GEO-E058, attached to the parent claim GEO-C004, which reports the interior subsample with the same elemental spectrum beneath plagioclase. This is the same team and the same fragment, and the analysis is EDS, which is elemental only.