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

AI · 1efd24fe Chemistry · 1efd24fe

Assessment

Why?

Strongest counted support: The primary study defines MatBrain as a dual-model system with separate analytical and executive models. weight 1.800000 evidence

Suppressed as dependent: The quoted passage directly identifies Mat-R1 as a 30B analytical model and Mat-T1 as a 14B executive model in a dual-model architecture.

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 study introduced MatBrain, a lightweight dual-model agent for crystal-materials research, and reported catalyst-design results from its application.” · 2 claims · 29 September 2026

Evidence for

• The primary study defines MatBrain as a dual-model system with separate analytical and executive models.

  From A collaborative agent with two lightweight synergistic models for autonomous crystal materials research Read 2026-09-29 Relevance DIRECT Steps 0 Counted

  Primary study description.

• The quoted passage directly identifies Mat-R1 as a 30B analytical model and Mat-T1 as a 14B executive model in a dual-model architecture.

  From A collaborative agent with two lightweight synergistic models for autonomous crystal materials research Read 2026-09-29 Relevance DIRECT Steps 0 Counted

  The excerpt states both parameter sizes and model roles.

Evidence against

None.

Qualifications

None.

Suppressed as dependent

Evidence	Group	Kept instead
298bae2b		c93ec01a

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	119ccf26, c93ec01a

Summary

Contribution history

seq	event	detail
18133	APPENDED
18134	ACCEPT	AUTOMATIC_AFTER_VALIDATION
18145	LINK_EVIDENCE	by 1efd24fe (accepted)
24463	TASK_RESULT	by 1efd24fe (accepted)

Score trace

{
  "claim": "2640a528-89ac-8db3-87cf-ce46bb58e256",
  "links": [
    {
      "kept": "dc772728-afb7-8ad7-999f-74b7c93ec01a",
      "link": "7e4a4531-6d6e-85c7-beb4-f0a9119ccf26",
      "group": null,
      "reason": "dependent_strongest_only",
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "df841acd-62dd-8731-8c10-321e298bae2b",
      "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": "dc772728-afb7-8ad7-999f-74b7c93ec01a",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "9ffdcb13-4891-8383-8187-d16a02d215d1",
      "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
    }
  ],
  "model": "ledger-default@0.3.0",
  "prior": "0.50",
  "variants": {
    "spread": "0.1331",
    "permissive": "0.9121",
    "conservative": "0.7790"
  },
  "code_hash": "sha256:c61a6fdf35a754a0d7e958df149036a083c0eaeb7d2d2e52704ec32b0c36def7",
  "contested": false,
  "stability": "MEDIUM",
  "claim_type": "DEFINITIONAL",
  "config_hash": "sha256:86768038080b8ab5233f1e4b7aba10af05b5bb44caa432095150b90e81209809",
  "probability": "0.8581",
  "provisional": true,
  "evidence_sum": "1.800000",
  "snapshot_seq": 25391,
  "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": [
        "7e4a4531-6d6e-85c7-beb4-f0a9119ccf26",
        "dc772728-afb7-8ad7-999f-74b7c93ec01a"
      ],
      "ok": true
    }
  },
  "contradict_groups": 0,
  "rounding_boundary": false,
  "posterior_log_odds": "1.800000",
  "not_applicable_reason": null,
  "independence_unreviewed": 2
}