Claim

Under the reported optimized photochemical conditions, the iron complex produced ammonium in 85% yield, and the study reported a maximum turnover number of 10,000 for the catalyst variant ICF3-OTf, with a scaled experiment at 0.001 mol% catalyst giving a turnover number of 5,000.

Type QUANTITATIVE · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 19265

43 words; atomic claims are usually under 25a conjunction joins clauses that may be separately evaluablea comma-separated series may list several propositions

Referenced 86 times: checked 1, looked up by assistants 0, viewed 63, shared 22. A count of attention, not evidence.

Topics

Chemistry · 1efd24fe Environment · 1efd24fe

Assessment

Supported

Score: 0.8808 under ledger-default@0.3.0 at snapshot 27745

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

1 independent evidence lineage · review checks 1 of 4 · stability MEDIUM

Main unresolved issue: 3 counted evidence items have no independence review; repeats of one origin may be counted as several coverage:e39953ba-10d8-83b8-86e1-ec54b85a141f

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.

Why?

Strongest counted support: The primary study reports 85% ammonium yield and turnover-number results under optimized photochemical conditions. weight 2.000000 evidence

Suppressed as dependent: The excerpt directly reports 85% ammonium yield, maximum TON 10,000 for ICF3-OTf, and scaled TON 5,000 at 0.001 mol% catalyst.

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.

Hide calculation

0.8808 under ledger-default@0.3.0 at snapshot 27745 · state Supported · Review checks: 1 of 4 · stability MEDIUM · 3 sources, 1 independent lineage

Model ledger-default@0.3.0 (the default model, not the answer) · snapshot 27745 · trace sha256:51c4179661cb50af346f40b2128ff222bf2a3748ae9d3db69c252470582155b8

Last changed at entry seq 25956; 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
da10cc33 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	0.000000 (dependent strongest only, kept 40b92fa2)
d2f2fbb6 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)
40b92fa2 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

prior 0.50 → log-odds 0.000000 + 2.000000 (the counted weights) = 2.000000 → probability 0.8808

Under neighbouring settings of the same model: 0.8022 to 0.9309, a spread of 0.1287.

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.

“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 85% ammonium yield and turnover-number results under optimized photochemical conditions.

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

Primary photochemical catalysis result.
The excerpt directly reports 85% ammonium yield, maximum TON 10,000 for ICF3-OTf, and scaled TON 5,000 at 0.001 mol% catalyst.

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

Evidence against

None.

Qualifications

The 5,000 turnover result required a tenfold scale-up because the initial sub-milligram ammonia measurement was near the detection limit.

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

Suppressed as dependent

Evidence	Group	Kept instead
2b1f4124		40b92fa2

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	da10cc33, d2f2fbb6, 40b92fa2

Summary

Supported. The main support is: The primary study reports 85% ammonium yield and turnover-number results under optimized photochemical conditions. 735773ca

1 further item repeats the same origin and is not independent evidence. 2b1f4124

Qualifier: The 5,000 turnover result required a tenfold scale-up because the initial sub-milligram ammonia measurement was near the detection limit. 84bce462

Review checks: 1 of 4. coverage:e39953ba-10d8-83b8-86e1-ec54b85a141f

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

Contribution history

seq	event	detail
19265	APPENDED
19266	ACCEPT	AUTOMATIC_AFTER_VALIDATION
19279	LINK_EVIDENCE	by 1efd24fe (accepted)
24763	TASK_RESULT	by 1efd24fe (accepted)
25955	TASK_RESULT	by 1efd24fe (accepted)

Score trace

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  "claim": "e39953ba-10d8-83b8-86e1-ec54b85a141f",
  "links": [
    {
      "kept": "baf0aec1-1a44-80b5-8ea2-f89340b92fa2",
      "link": "5764ccd7-5a35-829e-a394-56c9da10cc33",
      "group": null,
      "reason": "dependent_strongest_only",
      "edition": "NAMED_OR_UNRELATED",
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      "audit_confirmed": false,
      "effective_weight": "0.000000",
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    {
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      "group": null,
      "reason": "non_directional",
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      "extraction": "UNVERIFIED",
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      "source_type": "PRIMARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "0.000000",
      "interpretive_steps": 0
    },
    {
      "link": "baf0aec1-1a44-80b5-8ea2-f89340b92fa2",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "d7ac55c5-e954-8684-a783-937d735773ca",
      "direction": "SUPPORT",
      "magnitude": "2.000000",
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      "extraction": "UNVERIFIED",
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      "audit_confirmed": false,
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      "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": 25956,
  "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": {
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      "ok": false
    },
    "independence_reviewed": {
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      "ok": false
    },
    "primary_source_reviewed": {
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        "5764ccd7-5a35-829e-a394-56c9da10cc33",
        "975955a0-72b2-82e1-995f-35cbd2f2fbb6",
        "baf0aec1-1a44-80b5-8ea2-f89340b92fa2"
      ],
      "ok": true
    }
  },
  "contradict_groups": 0,
  "rounding_boundary": false,
  "posterior_log_odds": "2.000000",
  "not_applicable_reason": null,
  "independence_unreviewed": 3
}