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

Physics · 1efd24fe

Assessment

Why?

Strongest counted support: The primary article reports extraction from superfluid helium and velocity and yield characteristics consistent with a superthermal beam. weight 2.000000 evidence

Suppressed as dependent: The passage directly reports a high-brightness muonium beam extracted from a thin layer of superfluid helium.

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 Nature Physics study generated a high-brightness muonium beam by extracting muonium from a thin superfluid-helium layer and reported velocity...” · 2 claims · 29 September 2026

Evidence for

• The primary article reports extraction from superfluid helium and velocity and yield characteristics consistent with a superthermal beam.

  From Generation of a high-intensity, superthermal muonium beam for gravity and laser spectroscopy experiments Read 2026-09-29 Relevance DIRECT Steps 0 Counted

  The abstract directly reports beam generation and extraction from a thin superfluid-helium layer.

• The passage directly reports a high-brightness muonium beam extracted from a thin layer of superfluid helium.

  From Generation of a high-intensity, superthermal muonium beam for gravity and laser spectroscopy experiments Read 2026-09-29 Relevance DIRECT Steps 0 Counted

  Beam brightness, muonium, extraction, and superfluid-helium layer match.

Evidence against

None.

Qualifications

None.

Suppressed as dependent

Evidence	Group	Kept instead
21ce5846		811d25d3

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	811d25d3, 25751fe5

Summary

Contribution history

seq	event	detail
21806	APPENDED
21807	ACCEPT	AUTOMATIC_AFTER_VALIDATION
21816	LINK_EVIDENCE	by 1efd24fe (accepted)
24862	TASK_RESULT	by 1efd24fe (accepted)

Score trace

{
  "claim": "73d816be-209c-8d01-81bc-8974e6f82d49",
  "links": [
    {
      "link": "5026491c-d826-8ed7-8396-8d96811d25d3",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "41f0f7a3-c7b5-8f19-9f44-437f49bab8de",
      "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": "5026491c-d826-8ed7-8396-8d96811d25d3",
      "link": "a46a3624-d973-823f-a16f-9cbd25751fe5",
      "group": null,
      "reason": "dependent_strongest_only",
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "aaef816b-b3d6-83e4-89b8-5a2521ce5846",
      "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
    }
  ],
  "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": "OBSERVATIONAL",
  "config_hash": "sha256:86768038080b8ab5233f1e4b7aba10af05b5bb44caa432095150b90e81209809",
  "probability": "0.8808",
  "provisional": true,
  "evidence_sum": "2.000000",
  "snapshot_seq": 24868,
  "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": [
        "5026491c-d826-8ed7-8396-8d96811d25d3",
        "a46a3624-d973-823f-a16f-9cbd25751fe5"
      ],
      "ok": true
    }
  },
  "contradict_groups": 0,
  "rounding_boundary": false,
  "posterior_log_odds": "2.000000",
  "not_applicable_reason": null,
  "independence_unreviewed": 2
}