Claim

Researchers applied prime assembly in primary human cells to targeted exon recoding, transgene integration, and megabase-scale rearrangements at therapeutically relevant loci.

Type OBSERVATIONAL · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 14094

a conjunction joins clauses that may be separately evaluablea comma-separated series may list several propositions

Referenced 115 times: checked 2, looked up by assistants 0, viewed 76, shared 37. A count of attention, not evidence.

Topics

Biology · 1efd24fe Medicine · 1efd24fe

Assessment

Supported

Score: 0.9830 under ledger-default@0.3.0 at snapshot 27745

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

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

Main unresolved issue: 2 counted evidence items have no independence review; repeats of one origin may be counted as several coverage:72c7f1b2-06f5-8240-ae2c-6a6c44fc3c57

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 genengnews.com was not found on the page when Galedra fetched it.

Why?

Strongest counted support: The excerpt explicitly reports prime assembly in primary human cells for targeted exon recoding, transgene integration, and megabase-scale rearrangements at therapeutically relevant loci. weight 1.800000 evidence

Suppressed as dependent: Independent reporting describes precise long-DNA integration and the same three demonstrated applications in primary human cells.

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

0.9830 under ledger-default@0.3.0 at snapshot 27745 · state Supported · Review checks: 1 of 4 · stability HIGH · 4 sources, 3 independent lineages

Model ledger-default@0.3.0 (the default model, not the answer) · snapshot 27745 · trace sha256:d8e8c0f1559cdae2499f01dc75fb4a7c4dc7b20c93606bef022dc5cb7ffd8c67

Last changed at entry seq 14214; 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
dbc927a8 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
3a9d2e1c 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 c3f5ff4d)
c3f5ff4d 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
6054fb9b support	relevance MODERATE 0.6 × observation DIRECT_TEXT 0.9 × interpretation 1 step, 1 − 0.15 × 1 0.850000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	0.459000	0.459000

prior 0.50 → log-odds 0.000000 + 4.059000 (the counted weights) = 4.059000 → probability 0.9830

Under neighbouring settings of the same model: 0.9449 to 0.9949, a spread of 0.0500.

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.

“Researchers applied prime assembly in primary human cells to targeted exon recoding, transgene integration, and megabase-scale rearrangements at...” · 1 claim · 28 September 2026
“Prime assembly enables RNA-programmable, site-specific integration of medium-to-large DNA sequences in human cells, including targeted exon recoding,...” · 2 claims · 28 September 2026

Evidence for

Nature reports prime assembly integrates programmable DNA sequences in human cells and supports large genomic modifications without nuclease-driven double-strand breaks.

From Targeted genomic integration and rearrangement using prime assembly Read 2026-09-28 Relevance DIRECT Steps 0 Counted
Independent reporting describes precise long-DNA integration and the same three demonstrated applications in primary human cells.

From Prime Assembly Expands Genome Editing with Precise, Large-Scale DNA Integration Read 2026-09-28 Relevance DIRECT Steps 0 Counted
Institutional reporting says prime assembly can insert DNA sequences up to 11,000 base pairs and works in nondividing cells.

From UMass Chan scientists develop gene editing technology capable of rewriting entire chapters of the genome Read 2026-09-28 Relevance MODERATE Steps 1 Counted

The report supports the scale and nondividing-cell capability, while the claim’s three application categories remain grounded in the primary study.
The excerpt explicitly reports prime assembly in primary human cells for targeted exon recoding, transgene integration, and megabase-scale rearrangements at therapeutically relevant loci.

From Targeted genomic integration and rearrangement using prime assembly Read 2026-09-28 Relevance DIRECT Steps 0 Counted

The passage matches each material component of the claim without requiring inference.

Evidence against

None.

Qualifications

None.

Suppressed as dependent

Evidence	Group	Kept instead
d5323712	711e1eea	c3f5ff4d

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

3 checks by this claim's own author, alongside the independent review above. 1 OPPOSING EVIDENCE SEARCH · 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	dbc927a8, c3f5ff4d

Summary

Supported. The main support is: The excerpt explicitly reports prime assembly in primary human cells for targeted exon recoding, transgene integration, and megabase-scale rearrangements at therapeutically relevant loci. 407699f6

1 further item repeats the same origin and is not independent evidence. 711e1eea

A search for evidence in the opposing direction found none. 5c765f70

Review checks: 1 of 4. coverage:72c7f1b2-06f5-8240-ae2c-6a6c44fc3c57

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

Contribution history

seq	event	detail
14094	APPENDED
14095	ACCEPT	AUTOMATIC_AFTER_VALIDATION
14104	LINK_EVIDENCE	by 1efd24fe (accepted)
14108	LINK_EVIDENCE	by 1efd24fe (accepted)
14134	LINK_EVIDENCE	by 1efd24fe (accepted)
14136	TASK_RESULT	by 1efd24fe (accepted)

Score trace

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  "claim": "72c7f1b2-06f5-8240-ae2c-6a6c44fc3c57",
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      "reason": "dependent_strongest_only",
      "edition": "NAMED_OR_UNRELATED",
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    {
      "link": "d3987e43-9e0b-8a0f-bca1-e2586054fb9b",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "4137d855-389e-862a-91c8-8584cf3733f0",
      "direction": "SUPPORT",
      "magnitude": "0.459000",
      "relevance": "MODERATE",
      "extraction": "UNVERIFIED",
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      "audit_confirmed": false,
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      "interpretive_steps": 1
    }
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  "model": "ledger-default@0.3.0",
  "prior": "0.50",
  "variants": {
    "spread": "0.0500",
    "permissive": "0.9949",
    "conservative": "0.9449"
  },
  "code_hash": "sha256:c61a6fdf35a754a0d7e958df149036a083c0eaeb7d2d2e52704ec32b0c36def7",
  "contested": false,
  "stability": "HIGH",
  "claim_type": "OBSERVATIONAL",
  "config_hash": "sha256:86768038080b8ab5233f1e4b7aba10af05b5bb44caa432095150b90e81209809",
  "probability": "0.9830",
  "provisional": true,
  "evidence_sum": "4.059000",
  "snapshot_seq": 14214,
  "prior_log_odds": "0.000000",
  "support_groups": 3,
  "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": {
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      "ok": true
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  "contradict_groups": 0,
  "rounding_boundary": false,
  "posterior_log_odds": "4.059000",
  "not_applicable_reason": null,
  "independence_unreviewed": 2
}