Claim

The three newly identified Denisovan fossils came from Bianfu Cave layers dated to approximately 167,000–134,000 years ago.

Type QUANTITATIVE · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 14286 · qualifiers {"time_range":"Approximate layer dates reported by the study; not direct individual-fossil ages."}

a comma-separated series may list several propositions

Referenced 141 times: checked 3, looked up by assistants 2, viewed 98, shared 38. A count of attention, not evidence.

Topics

Science · 1efd24fe Archaeology · 1efd24fe

Assessment

Supported

Score: 0.9925 under ledger-default@0.3.0 at snapshot 27745

2 of 4 review checks done · 1 counted · 1 by the author only

3 independent evidence lineages · review checks 1 of 4 · stability HIGH

Main unresolved issue: 5 counted evidence items have no independence review; repeats of one origin may be counted as several coverage:66144f33-ccfc-8956-bad3-891d9161dc12

Not yet independently audited.Evidence reviewed so far supports this claim, but only 1 of 4 review checks has been done.A quoted passage from nature.com was not found on the page when Galedra fetched it.A quoted passage is on the page but our reader could not line it up with it, because the publisher's markup interrupts the sentence.

Why?

Strongest counted support: The abstract reports the screening scale, three fossils, their layer age range, and proteomic Denisovan identification. weight 2.000000 evidence

Suppressed as dependent: The excerpt directly states that the three fossils came from layers dated to approximately 167–134 thousand years ago.

Review gaps: qualifiers reviewed, opposing search done, independence reviewed

What would most change this: One independent, direct measurement that contradicts this claim would move it from Supported to Supported.

Hide calculation

0.9925 under ledger-default@0.3.0 at snapshot 27745 · state Supported · Review checks: 1 of 4 · stability HIGH · 5 sources, 3 independent lineages

Model ledger-default@0.3.0 (the default model, not the answer) · snapshot 27745 · trace sha256:339d6fba1a3ac0e9fe89bbe00851f26d90e950d76bb711858226d393819fdb44

Last changed at entry seq 19310; nothing logged since has borne on this claim.

How the number was reached

Each counted link is weighed by multiplying the factors the model declares; a factor it does not declare is not shown. Every factor name below links to what that number means.

Link	Working	Weight	Counted as
9be9f477 support	relevance DIRECT 2.0 × observation MEASUREMENT 1.0 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	2.000000	2.000000
e6b6e62f support	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	1.800000
e2a3a7d8 qualify	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	0.000000 (non directional)
1bdb229f support	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	0.000000 (dependent strongest only, kept 9be9f477)
a605b7d0 support	relevance STRONG 1.2 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.080000	1.080000

prior 0.50 → log-odds 0.000000 + 4.880000 (the counted weights) = 4.880000 → probability 0.9925

Under neighbouring settings of the same model: 0.9682 to 0.9982, a spread of 0.0300.

Half-even rounding, six places for weights and four for the probability. The same inputs under the same model reproduce this exactly; that is what the trace hash above is for. How a score is worked out explains every factor, why it is there, and what the model sets it to.

Your view

Registered views

Nobody has registered a view yet.

Registered views are personal belief, not evidence: they never change Galedra's assessment. Affiliations are self-declared and shown only for groups of 5 or more.

Checked as part of

Statements this claim was broken out of. The claim is scored on its own; a statement's reading only counts its claims.

“The three newly identified Denisovan fossils came from Bianfu Cave layers dated to approximately 167,000–134,000 years ago.” · 1 claim · 29 September 2026
“The three newly identified Denisovan fossils came from Bianfu Cave layers dated to approximately 167,000–134,000 years ago.” · 1 claim · 28 September 2026
“A 2026 Nature study identified three Denisovan hominin fossils from Bianfu Cave in Southwest China after screening more than 60,000 bone fragments; the...” · 2 claims · 28 September 2026

Evidence for

The abstract reports the screening scale, three fossils, their layer age range, and proteomic Denisovan identification.

From Ancient proteins identify various Denisovan remains from Southwest China Read 2026-09-29 Relevance DIRECT Steps 0 Counted

The abstract directly reports the approximate layer age range.
The excerpt directly states that the three fossils came from layers dated to approximately 167–134 thousand years ago.

From Ancient proteins identify various Denisovan remains from Southwest China Read 2026-09-29 Relevance DIRECT Steps 0 Counted

The claim correctly describes approximate layer dates, not direct ages of each fossil.
The CAS report maps the three fossils to Layer 7 at 148–134 ka and Layer 9 at 167–150 ka, jointly spanning approximately 167–134 ka.

From Denisovan Radius Discovered for First Time in Southwest China Read 2026-09-28 Relevance STRONG Steps 0 Counted

Independent institutional account supports the aggregate range while clarifying the layer-specific dates.
The primary Nature study places the reported Denisovan occupation at approximately 167,000 to 134,000 years ago.

From Ancient proteins identify various Denisovan remains from Southwest China Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Primary archaeological chronology.

Evidence against

None.

Qualifications

The CAS report assigns two specimens to Layer 7 at 148–134 ka and one to Layer 9 at 167–150 ka.

From Denisovan Radius Discovered for First Time in Southwest China Read 2026-09-28 Relevance DIRECT Steps 0 Counted

Suppressed as dependent

Evidence	Group	Kept instead
88cf96bb		9be9f477

Inferences

Concluded from

None.

Used as a premise in

None.

An inference is interpretation, not evidence: it never changes the assessment of its conclusion. Each premise is a claim with its own evidence.

Threads

None. Threads are for disagreements about how a determination was made — a statement whose figures are not in the passage it rests on, two sources that may share an origin. Something about the world belongs in the evidence above.

Claim edges

From	Relationship	To
c9c6ceea	NARROWS	9161dc12
232bb500	NARROWS	9161dc12

Review checklist

Review checks: 1 of 4

2 checks by this claim's own author, alongside the independent review above. 1 QUALIFIER CHECK · 1 EVIDENCE VERIFICATION. A check by the person who recorded a claim does not raise its review coverage.

Check	Done	By
qualifiers reviewed	no
opposing search done	no
independence reviewed	no
primary source reviewed	yes	9be9f477, e6b6e62f, 1bdb229f

Summary

Supported. The main support is: The abstract reports the screening scale, three fossils, their layer age range, and proteomic Denisovan identification. 39b7216c

1 further item repeats the same origin and is not independent evidence. 88cf96bb

Qualifier: The CAS report assigns two specimens to Layer 7 at 148–134 ka and one to Layer 9 at 167–150 ka. bf7010d5

A narrower version of this claim is supported. c9c6ceea

A narrower version of this claim is supported. 232bb500

Review checks: 1 of 4. coverage:66144f33-ccfc-8956-bad3-891d9161dc12

Generated by stub-v0.1; every sentence cites graph ids.

Contribution history

seq	event	detail
14286	APPENDED
14287	ACCEPT	AUTOMATIC_AFTER_VALIDATION
14294	LINK_EVIDENCE	by 1efd24fe (accepted)
14298	TASK_RESULT	by 1efd24fe (accepted)
14307	TASK_RESULT	by 1efd24fe (accepted)
14333	LINK_EVIDENCE	by 1efd24fe (accepted)
19309	LINK_EVIDENCE	by 1efd24fe (accepted)

Score trace

{
  "claim": "66144f33-ccfc-8956-bad3-891d9161dc12",
  "links": [
    {
      "link": "25ff869d-b291-8fc2-bda0-92719be9f477",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "6176f163-1276-87eb-a8f5-f2f139b7216c",
      "direction": "SUPPORT",
      "magnitude": "2.000000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "MEASUREMENT",
      "source_type": "PRIMARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "2.000000",
      "interpretive_steps": 0
    },
    {
      "link": "60c39eda-a15d-8439-8666-57b3e6b6e62f",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "1b252e60-1191-8842-a562-057c6d0b69d7",
      "direction": "SUPPORT",
      "magnitude": "1.800000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "DIRECT_TEXT",
      "source_type": "PRIMARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "1.800000",
      "interpretive_steps": 0
    },
    {
      "link": "a35eca2a-1b03-8655-b4a4-fcaee2a3a7d8",
      "group": null,
      "reason": "non_directional",
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "baa507a8-4a1d-8e01-904c-df8bbf7010d5",
      "direction": "QUALIFY",
      "magnitude": "1.800000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "DIRECT_TEXT",
      "source_type": "SECONDARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "0.000000",
      "interpretive_steps": 0
    },
    {
      "kept": "25ff869d-b291-8fc2-bda0-92719be9f477",
      "link": "c9dc5d10-38e5-8f9a-9434-05981bdb229f",
      "group": null,
      "reason": "dependent_strongest_only",
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "c51fa320-72e4-81ec-930f-cd3588cf96bb",
      "direction": "SUPPORT",
      "magnitude": "1.800000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "DIRECT_TEXT",
      "source_type": "PRIMARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "0.000000",
      "interpretive_steps": 0
    },
    {
      "link": "ec0d204e-6289-818b-af40-fcdba605b7d0",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "15c9db64-3267-8c7d-9dba-a84cd978f965",
      "direction": "SUPPORT",
      "magnitude": "1.080000",
      "relevance": "STRONG",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "DIRECT_TEXT",
      "source_type": "SECONDARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "1.080000",
      "interpretive_steps": 0
    }
  ],
  "model": "ledger-default@0.3.0",
  "prior": "0.50",
  "variants": {
    "spread": "0.0300",
    "permissive": "0.9982",
    "conservative": "0.9682"
  },
  "code_hash": "sha256:c61a6fdf35a754a0d7e958df149036a083c0eaeb7d2d2e52704ec32b0c36def7",
  "contested": false,
  "stability": "HIGH",
  "claim_type": "QUANTITATIVE",
  "config_hash": "sha256:86768038080b8ab5233f1e4b7aba10af05b5bb44caa432095150b90e81209809",
  "probability": "0.9925",
  "provisional": true,
  "evidence_sum": "4.880000",
  "snapshot_seq": 19310,
  "prior_log_odds": "0.000000",
  "support_groups": 3,
  "model_dependent": false,
  "review_coverage": "0.25",
  "truth_evaluable": true,
  "assessment_state": "SUPPORTED",
  "review_checklist": {
    "qualifiers_reviewed": {
      "by": [],
      "ok": false
    },
    "opposing_search_done": {
      "by": [],
      "ok": false
    },
    "independence_reviewed": {
      "by": [],
      "ok": false
    },
    "primary_source_reviewed": {
      "by": [
        "25ff869d-b291-8fc2-bda0-92719be9f477",
        "60c39eda-a15d-8439-8666-57b3e6b6e62f",
        "c9dc5d10-38e5-8f9a-9434-05981bdb229f"
      ],
      "ok": true
    }
  },
  "contradict_groups": 0,
  "rounding_boundary": false,
  "posterior_log_odds": "4.880000",
  "not_applicable_reason": null,
  "independence_unreviewed": 5
}