Claim

Model ledger-default@0.1.0 ledger-strict@0.1.0 ledger-default@0.2.0 ledger-strict@0.2.0 ledger-default@0.3.0 (default) ledger-strict@0.3.0 Snapshot seq

Topics

Chemistry · 1efd24fe Environment · 1efd24fe

Assessment

Why?

Strongest counted support: The primary study reports the zinc-complex nitrate binding constants with and without appended hydrogen-bond donors. weight 2.000000 evidence

Suppressed as dependent: The excerpt supports the two first-event affinities and seven-order difference, but does not identify the appended donors.

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 Unresolved.

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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.

• “A 2026 Nature Chemistry study reported that secondary-sphere hydrogen bonds enhanced nitrate binding in zinc complexes and enabled iron-catalyzed nitrate...” · 3 claims · 29 September 2026

Evidence for

• The primary study reports the zinc-complex nitrate binding constants with and without appended hydrogen-bond donors.

  From Secondary-sphere hydrogen bonding promotes catalytic nitrate reduction at iron Read 2026-09-29 Relevance DIRECT Steps 0 Counted

  Primary binding measurements.

• The excerpt supports the two first-event affinities and seven-order difference, but does not identify the appended donors.

  From Secondary-sphere hydrogen bonding promotes catalytic nitrate reduction at iron Read 2026-09-29 Relevance MODERATE Steps 0 Counted

  The numerical affinity comparison is explicit; the structural donor attribution is not stated in this excerpt.

Evidence against

None.

Qualifications

None.

Suppressed as dependent

Evidence	Group	Kept instead
9dcbda8f		0635cde5

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

None. Edges are stored and displayed; v0.1 does not propagate probability across them.

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	0635cde5, ec70fd65

Summary

Contribution history

seq	event	detail
19257	APPENDED
19258	ACCEPT	AUTOMATIC_AFTER_VALIDATION
19275	LINK_EVIDENCE	by 1efd24fe (accepted)
24756	TASK_RESULT	by 1efd24fe (accepted)

Score trace

{
  "claim": "a4b1b65d-1aba-8d92-8209-0947ee2cfe7a",
  "links": [
    {
      "link": "59ac28a1-d5d3-8bd7-bfe1-91d90635cde5",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "a9cc91b4-758a-89c5-95f2-6e6f6a187b5c",
      "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
    },
    {
      "kept": "59ac28a1-d5d3-8bd7-bfe1-91d90635cde5",
      "link": "8da33cd3-481d-85fb-81e2-92daec70fd65",
      "group": null,
      "reason": "dependent_strongest_only",
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "e5d30611-00fe-8408-8443-49fc9dcbda8f",
      "direction": "SUPPORT",
      "magnitude": "0.540000",
      "relevance": "MODERATE",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "DIRECT_TEXT",
      "source_type": "PRIMARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "0.000000",
      "interpretive_steps": 0
    }
  ],
  "model": "ledger-default@0.3.0",
  "prior": "0.50",
  "variants": {
    "spread": "0.1287",
    "permissive": "0.9309",
    "conservative": "0.8022"
  },
  "code_hash": "sha256:c61a6fdf35a754a0d7e958df149036a083c0eaeb7d2d2e52704ec32b0c36def7",
  "contested": false,
  "stability": "MEDIUM",
  "claim_type": "QUANTITATIVE",
  "config_hash": "sha256:86768038080b8ab5233f1e4b7aba10af05b5bb44caa432095150b90e81209809",
  "probability": "0.8808",
  "provisional": true,
  "evidence_sum": "2.000000",
  "snapshot_seq": 25948,
  "prior_log_odds": "0.000000",
  "support_groups": 1,
  "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": [
        "59ac28a1-d5d3-8bd7-bfe1-91d90635cde5",
        "8da33cd3-481d-85fb-81e2-92daec70fd65"
      ],
      "ok": true
    }
  },
  "contradict_groups": 0,
  "rounding_boundary": false,
  "posterior_log_odds": "2.000000",
  "not_applicable_reason": null,
  "independence_unreviewed": 2
}