Claim

Across 20 client chips, 117 of 120 modulators functioned; their mean measured Vπ was 5.8 ± 1.4 V and interference visibility was 33.8 ± 5.6 dB.

Type QUANTITATIVE · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 21854

26 words; atomic claims are usually under 25a conjunction joins clauses that may be separately evaluable

Referenced 104 times: checked 2, looked up by assistants 0, viewed 58, shared 44. A count of attention, not evidence.

Topics

Physics · 1efd24fe Software · 1efd24fe

Assessment

Supported

Score: 0.9781 under ledger-default@0.3.0 at snapshot 27745

1 of 4 review checks done · 1 counted

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

Main unresolved issue: 3 counted evidence items have no independence review; repeats of one origin may be counted as several coverage:5c17046a-230e-85bb-b934-7335c5166598

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 modulator yield and measured Vπ and interference visibility. weight 2.000000 evidence

Suppressed as dependent: The passage directly reports 117 of 120 modulators across 20 chips functioning, mean Vπ of 5.8 ± 1.4 V, and visibility of 33.8 ± 5.6 dB.

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

0.9781 under ledger-default@0.3.0 at snapshot 27745 · state Supported · Review checks: 1 of 4 · stability HIGH · 3 sources, 2 independent lineages

Model ledger-default@0.3.0 (the default model, not the answer) · snapshot 27745 · trace sha256:d675ad7ae596ea0491eb57d98611f9b237adc5caeeeac8849a2b535616913861

Last changed at entry seq 24873; 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
f7cac9f9 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
925e72fa 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
8ac7fb13 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 925e72fa)

prior 0.50 → log-odds 0.000000 + 3.800000 (the counted weights) = 3.800000 → probability 0.9781

Under neighbouring settings of the same model: 0.9346 to 0.9929, a spread of 0.0583.

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.

“Across 20 client chips, 117 of 120 modulators functioned; their mean measured Vπ was 5.8 ± 1.4 V and interference visibility was 33.8 ± 5.6 dB.” · 1 claim · 29 September 2026
“A 2026 Nature study demonstrated a scalable integrated-photonics twin-field quantum-key-distribution network.” · 3 claims · 29 September 2026

Evidence for

The primary study reports modulator yield and measured Vπ and interference visibility.

From Large-scale quantum communication networks with integrated photonics Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Exact hardware-yield result.
The article’s integrated-transmitter section repeats the modulator performance means and uncertainties.

From Large-scale quantum communication networks with integrated photonics Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Additional exact primary hardware-performance passage.
The passage directly reports 117 of 120 modulators across 20 chips functioning, mean Vπ of 5.8 ± 1.4 V, and visibility of 33.8 ± 5.6 dB.

From Large-scale quantum communication networks with integrated photonics Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Chip count, yield, and both performance metrics match.

Evidence against

None.

Qualifications

None.

Suppressed as dependent

Evidence	Group	Kept instead
62aa1893		925e72fa

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

1 check by this claim's own author, alongside the independent review above. 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	f7cac9f9, 925e72fa, 8ac7fb13

Summary

Supported. The main support is: The article’s integrated-transmitter section repeats the modulator performance means and uncertainties. f7f9cb62

1 further item repeats the same origin and is not independent evidence. 62aa1893

Review checks: 1 of 4. coverage:5c17046a-230e-85bb-b934-7335c5166598

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

Contribution history

seq	event	detail
21854	APPENDED
21855	ACCEPT	AUTOMATIC_AFTER_VALIDATION
21870	LINK_EVIDENCE	by 1efd24fe (accepted)
22028	LINK_EVIDENCE	by 1efd24fe (accepted)
24872	TASK_RESULT	by 1efd24fe (accepted)

Score trace

{
  "claim": "5c17046a-230e-85bb-b934-7335c5166598",
  "links": [
    {
      "link": "9ac679fa-9f5f-861f-b50b-c28af7cac9f9",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "53a7f9ab-b783-8d9c-b129-442df7f9cb62",
      "direction": "SUPPORT",
      "magnitude": "1.800000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "DIRECT_TEXT",
      "source_type": "PRIMARY_TEXT",
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      "audit_confirmed": false,
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      "interpretive_steps": 0
    },
    {
      "link": "ddcd46a6-2927-8927-a3fc-7374925e72fa",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "70eca599-8516-83a7-8f2f-4e99402a8dc6",
      "direction": "SUPPORT",
      "magnitude": "2.000000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "MEASUREMENT",
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      "effective_weight": "2.000000",
      "interpretive_steps": 0
    },
    {
      "kept": "ddcd46a6-2927-8927-a3fc-7374925e72fa",
      "link": "feea373d-0067-8b70-a132-b3168ac7fb13",
      "group": null,
      "reason": "dependent_strongest_only",
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "aef867c2-c249-8b33-84e6-53c362aa1893",
      "direction": "SUPPORT",
      "magnitude": "1.800000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
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      "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": "0.0583",
    "permissive": "0.9929",
    "conservative": "0.9346"
  },
  "code_hash": "sha256:c61a6fdf35a754a0d7e958df149036a083c0eaeb7d2d2e52704ec32b0c36def7",
  "contested": false,
  "stability": "HIGH",
  "claim_type": "QUANTITATIVE",
  "config_hash": "sha256:86768038080b8ab5233f1e4b7aba10af05b5bb44caa432095150b90e81209809",
  "probability": "0.9781",
  "provisional": true,
  "evidence_sum": "3.800000",
  "snapshot_seq": 24873,
  "prior_log_odds": "0.000000",
  "support_groups": 2,
  "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": {
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      "ok": false
    },
    "primary_source_reviewed": {
      "by": [
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        "ddcd46a6-2927-8927-a3fc-7374925e72fa",
        "feea373d-0067-8b70-a132-b3168ac7fb13"
      ],
      "ok": true
    }
  },
  "contradict_groups": 0,
  "rounding_boundary": false,
  "posterior_log_odds": "3.800000",
  "not_applicable_reason": null,
  "independence_unreviewed": 3
}