Erebus

The Origins of SARS-CoV-2 · claim COV-C017 · Attribution rung · The Wuhan research program

Experiments materially similar to the cleavage-site work described in the 2018 proposal were performed on SARS-related coronaviruses before the outbreak.

The step from document to deed, stated explicitly because this is where the argument is usually smuggled across. There is no public record that the work was done.

AI-extractedorigin: casework/covid-origins digest — C016

credibility — is the claim itself true?

Unresolved

The proposal was not funded, no public record shows the experiment was carried out, and no published precursor sequence connects the contemplated constructs to SARS-CoV-2. Against that: the intelligence reporting records that the institute possessed reverse-genetic methods leaving no trace of modification, and the records that would settle the question — institutional biosafety approvals, internal project records, construct maps, synthesis orders, raw reads — have never been produced. Unresolved here means genuinely open in both directions.

diagnosticity — how much does it decide the thesis?

high

Resolving it either way would move the case substantially. Documented performance of such work would convert a documentary coincidence into a mechanism; documented absence would reduce the proposal to what it appears to be on its face.

Evidence

Supports (2)

Supports· moderateCOV-E027

The proposal's cleavage-site passage, at a confirmed locator

what the source states
Under the run-in heading "S2 Proteolytic Cleavage and Glycosylation Sites": "We will analyze all SARSr-CoV S gene sequences for appropriately conserved proteolytic cleavage sites in S2 and for the presence of potential furin cleavage sites. SARSr-CoV S with mismatches in proteolytic cleavage sites can be activated by exogenous trypsin or cathepsin L. Where clear mismatches occur, we will introduce appropriate human-specific cleavage sites and evaluate growth potential in Vero cells and HAE cultures." The proposal requested $14,209,245 across 3.5 project years, with performance sites including Kunming and Wuhan, China; Chapel Hill; New York; Singapore; Palo Alto; and Madison.
what we infer
A documented pre-pandemic intention, in a program with a Wuhan partner, to insert precisely the class of feature the pandemic virus carries. That is a real and uncomfortable coincidence of technique and timing, and it is evidence about what was proposed — not about what was done, which is graded separately. The non-award belongs beside the quotation wherever the quotation appears.
limitations
  • The text is OCR-derived from an image-only scan; two independent passes agree on every substantive word, and footnote superscripts were dropped rather than guessed.
  • The available copy is a third-party archive upload, not an official release or authenticated FOIA production.
  • The proposal was not funded, confirmed by the congressional record, contemporaneous reporting, and a negative check of federal award data.
  • A phrase widely attributed to this document — about a cleavage site 'able to interact with furin' — is not proposal text but a journalist's wording, and is not quoted here.
Peter Daszak (2018)AI-verified citation
Supports· strongCOV-E029

The biosafety findings, with the same report's countervailing statements

what the source states
The report states that as of January 2019 institute researchers performed experiments with SARS-like coronaviruses in biosafety level 2 laboratories, and that some researchers probably did not use adequate biosafety precautions at least some of the time. The same document records that the intelligence community knows of no specific biosafety incident that caused the pandemic, characterizes a November 2019 biosafety training course at the institute as appearing routine rather than an emergency response, and describes a 2017 dissertation demonstrating reverse-genetic cloning that leaves no trace of modification.
what we infer
Opportunity is established; occurrence is not. This single document contains the strongest official support for the research-related family and the strongest official statements against it, which is why this case quotes both halves from it rather than mining one side.
limitations
  • A declassified summary whose underlying reporting cannot be audited.
  • Records drawn from this document share an independence group and must not be counted as separate confirmations.

Qualifies (1)

Qualifies· moderateCOV-E028

The draft margin comment, quoted whole rather than in its usual truncated form

what the source states
A margin comment appearing five times across successive drafts, attributed within the release to the proposal's lead author: "Ralph, Zhengli. If we win this contract, I do not propose that all of this work will necessarily be conducted by Ralph, but I do want to stress the US side of this proposal so that DARPA are comfortable with our team. Once we get the funds, we can then allocate who does what exact work, and I believe that a lot of these assays can be done in Wuhan as well…"
what we infer
Recorded in full deliberately. The comment is usually quoted from "Once we get the funds" onward, which removes the sentence stating its purpose — presenting a US-weighted team so the funder would be comfortable. Read whole, it evidences an intention to allocate assay work to Wuhan after an award, and an awareness that saying so up front would be unhelpful. Read truncated, it reads as concealment of a settled plan. The document supports the first reading and not the second, and the difference is one sentence.
limitations
  • Margin comments identify authors by Word initials only; the mapping to named individuals rests on email headers within the same release.
  • Drafts of a proposal that was never funded — they evidence what was drafted and discussed, not what was done.
  • The compilation is republished by an advocacy organization, though the underlying records are an authentic federal FOIA production.

strongest unresolved objection

An unfunded proposal is weak grounds for inferring the work happened anyway, and six years of investigation — including congressional subpoenas and a declassification review — has produced no document showing it did.

what would change our mind

  • Institutional biosafety approvals, internal project records, plasmid or synthesis orders, or raw sequencing reads bearing on whether the work was performed.

depends on

Assessment history

Append-only AI overlay records; the canon claim file is never mutated.

Unresolvedconfidence: moderate · anthropic/claude-opus-5 (scheduled maintenance run) · run 2026-08-26-auto-a2ud · unreviewed draft

The step from document to deed remains unmade: not funded, no public record of performance after FOIA productions and ODNI review, no published precursor — against an institute with no-trace cloning capability and records never produced (COV-E029). Feasibility and intent are not occurrence.

Unresolvedconfidence: moderate · anthropic/claude-opus-5 (scheduled maintenance run) · run 2026-08-26-auto-kg4n · unreviewed draft

The step from document to deed remains unbridged: not funded, no public record of performance after FOIA productions and ODNI review, against an institute with no-trace cloning capability and records never produced (COV-E028, COV-E029). Open in both directions.

Unresolvedconfidence: moderate · anthropic/claude-opus-5 (scheduled maintenance run) · run 2026-08-26-auto-l4iy · unreviewed draft

The step from document to deed remains unbridged: proposal unfunded, no public record of performance after FOIA productions and official review, no indication of a progenitor holding (COV-E019) — against no-trace cloning capability and records never produced (COV-E029). COV-E028 read whole evidences intended allocation, not performance.

Unresolvedconfidence: moderate · Gemini 3.1 Pro (Google) — independent check run via gemini-3.1-pro-preview · run 2026-08-26-check-gemini-r2 · unreviewed draft

The leap from the DEFUSE proposal's documentary intent to the actual execution of those experiments remains completely unverified by any public record. Resolving this claim would directly convert a suspicious documentary coincidence into a confirmed mechanism. The strongest opposing consideration is that six years of intensive global investigation, declassification reviews, and congressional subpoenas have failed to produce a single construct map, synthesis order, or biosafety approval indicating the work took place.

Unresolvedconfidence: moderate · Gemini 3.1 Pro (Google) — independent check run via gemini-3.1-pro-preview · run 2026-08-26-check-gemini-r3 · unreviewed draft

There is a total absence of public records, published precursor sequences, or laboratory logs demonstrating that the cleavage-site insertion work proposed in the DEFUSE document was ever executed. Despite extensive intelligence reviews, no affirmative proof exists. Conversely, the intelligence community notes the institute possessed untraceable cloning methods, and the relevant institutional biosafety and project records that could definitively settle the question remain unproduced.

Unresolvedconfidence: high · Gemini 3.1 Pro (Google) — independent check run via gemini-3.1-pro-preview · run 2026-08-26-check-gemini · unreviewed draft

There is zero public record or intelligence confirming that the cleavage-site insertion experiments detailed in the DEFUSE proposal were actually performed. At the same time, the necessary biosafety approvals, lab notebooks, and synthesis orders that could clear the institute have never been produced. The strongest opposing consideration is that an unfunded proposal is exceptionally weak grounds for inferring action, especially when six years of probing have failed to uncover a precursor sequence.

Unresolvedconfidence: moderate · GPT-5.1 (OpenAI) — independent check run via gpt-5.1 · run 2026-08-26-check-gpt-r2 · unreviewed draft

We know from COV-E027 and COV-E028 that DEFUSE contemplated cleavage insertions and that authors intended some assays to occur in Wuhan, and from COV-E029 and COV-E019 that WIV had capable reverse-genetic methods, so performance of such experiments is plausible. However, despite FOIA productions, ODNI review, and congressional investigations, there is no public record—biosafety approvals, project logs, construct maps, or sequence data—showing these experiments were actually carried out, leaving the claim genuinely open.

Unresolvedconfidence: moderate · GPT-5.1 (OpenAI) — independent check run via gpt-5.1 · run 2026-08-26-check-gpt-r3 · unreviewed draft

No evidence record in the dossier documents that DEFUSE‑style cleavage‑site experiments on SARS‑related coronaviruses were carried out; the proposal was not funded (COV-E027), FOIA’d drafts remain at the planning stage (COV-E028), and ODNI notes no indication that WIV’s pre‑pandemic work involved SARS‑CoV‑2 or a close progenitor (COV-E019). On the other hand, ODNI also records WIV’s use of seamless reverse‑genetics techniques and degraded biosafety practices (COV-E029), and critical internal project records have not been disclosed, so neither performance nor non‑performance of such experiments can be established.

Unresolvedconfidence: moderate · GPT-5.1 (OpenAI) — independent check run via gpt-5.1 · run 2026-08-26-check-gpt · unreviewed draft

No public document—grant award, protocol, construct map, biosafety approval, or sequence—demonstrates that cleavage‑site insertion work on SARS‑related viruses actually occurred pre‑pandemic, and years of congressional and intelligence review have not surfaced such evidence. Against this, WIV is documented as having reverse‑genetics capability, and relevant records remain undisclosed, so both “was done” and “was not done” remain plausible, leaving the claim unresolvable on current evidence.

Unresolvedconfidence: moderate · Grok 4.6 (xAI) — independent check run via grok-4.6 · run 2026-08-26-check-grok-r2 · unreviewed draft

No public record shows that experiments materially similar to the DEFUSE cleavage-site work were performed on SARS-related coronaviruses before the outbreak; no published precursor sequence connects the contemplated constructs to this virus; and six years of investigation, including congressional process and a declassification review, have not produced such a document. Against that, ODNI records that the institute possessed reverse-genetic methods leaving no trace, and the biosafety approvals, project files, synthesis orders, and raw reads that would settle the question have never been produced. The strongest opposing consideration is that an unfunded proposal is weak grounds for inferring the work happened anyway, so the open verdict is a statement about missing records rather than about balanced affirmative evidence.

Unresolvedconfidence: moderate · Grok 4.6 (xAI) — independent check run via grok-4.6 · run 2026-08-26-check-grok-r3 · unreviewed draft

No public record shows that experiments materially similar to the DEFUSE cleavage-site work were performed on SARS-related coronaviruses before the outbreak: the proposal was not funded, no published precursor sequence connects the contemplated constructs to SARS-CoV-2, and six years of investigation including congressional process and a declassification review have produced no biosafety approval, project file, synthesis order, or raw read showing the work. Against that, the intelligence reporting records that the institute possessed reverse-genetic methods leaving no trace, and the institutional files that would settle the question have never been produced. Strongest opposing consideration: treating an unfunded proposal plus capability as grounds to infer the deed smuggles the argument from document to mechanism; treating the silence of unproduced files as evidence the work was not done smuggles the other way.

Unresolvedconfidence: moderate · Grok 4.6 (xAI) — independent check run via grok-4.6 · run 2026-08-26-check-grok · unreviewed draft

No public record shows that experiments materially similar to the DEFUSE cleavage-site work were performed on SARS-related coronaviruses before the outbreak: the proposal was not funded, no published precursor sequence connects the contemplated constructs to SARS-CoV-2, and years of investigation including congressional process have not produced a biosafety approval, construct map, synthesis order, or raw read showing the work. Against that, the intelligence reporting records that the institute possessed reverse-genetic methods leaving no trace, and the records that would settle the question have never been produced. The strongest opposing consideration is that an unfunded proposal is weak grounds for inferring the work happened anyway, which is why the step from document to deed must remain a separate unresolved claim rather than being smuggled across.

Unresolvedconfidence: moderate · Kimi K3 (Moonshot, via Venice) — independent check run via kimi-k3 · run 2026-08-26-check-kimi-r2 · unreviewed draft

No public record shows the contemplated cleavage-site experiments were performed: the proposal was unfunded, no biosafety approval, project file, construct map, synthesis order, or precursor sequence connecting the contemplated work to SARS-CoV-2 has surfaced despite six years of subpoenas and a declassification review. That is the strongest opposing consideration, and it is real. But unresolved is the warranted verdict rather than weakly_supported-contra, because the records that would settle the question sit with a custodian that has never produced them, and the same declassified report that finds no indication of the work also records that the institute possessed reverse-genetic methods leaving no trace of modification — meaning absence of a detectable signature is not evidence of absence of the work. The claim is genuinely open in both directions, and the gap between document and deed is exactly where the case file locates it.

Unresolvedconfidence: moderate · Kimi K3 (Moonshot, via Venice) — independent check run via kimi-k3 · run 2026-08-26-check-kimi-r3 · unreviewed draft

The strongest opposing consideration is real: an unfunded proposal is weak grounds for inferring execution, and six years of congressional subpoenas and declassification review have produced no document showing the work was performed, no biosafety approval, no construct map, and no precursor sequence. Against that stand documented intent, an institute possessing methods that leave no trace of modification, and the wholesale non-production of exactly the records — project files, synthesis orders, raw reads — that would settle the question either way. Unresolved is substantive here and symmetric with C008: the absence of evidence is genuine, but the evidence-of-absence test was never permitted, and grading this weakly_supported while grading the animal-infection claim unresolved would break the symmetry the two absences demand. The claim is specifically testable and the test is a disclosure request, not a research program.

Unresolvedconfidence: moderate · Kimi K3 (Moonshot, via Venice) — independent check run via kimi-k3 · run 2026-08-26-check-kimi · unreviewed draft

No public record shows the proposed work was performed; the proposal was unfunded; and six years of investigation including congressional subpoenas and declassification review has produced no execution document — a genuinely strong negative consideration. Against it: the institute possessed traceless cloning methods per the intelligence reporting, and the records that would settle the question (biosafety approvals, construct maps, synthesis orders, raw reads) have never been produced, so absence of evidence here is substantially absence of access. "Unresolved" is the earned grade in both directions, with moderate confidence; the pull toward weakly_supported from the unfunded status is real but is answered by the opacity being itself documented.

Unresolvedconfidence: moderate · Opus 5 (Anthropic) — independent check run via claude-opus-5 · run 2026-08-26-check-opus-r2 · unreviewed draft

No public record shows the work was performed, the proposal was never funded, and no published precursor sequence connects any contemplated construct to SARS-CoV-2 — after six years including congressional subpoenas and a declassification review. Against that, the records that would settle it (biosafety approvals, project files, synthesis orders, raw reads) sit with a party that has declared its investigation closed, and the intelligence reporting notes seamless cloning capability. The strongest opposing consideration to my verdict is that sustained failure to find any trace where some searching was possible is mild evidence of absence; I keep the claim unresolved rather than weakly contradicted because the searching that mattered most was never permitted.

Unresolvedconfidence: moderate · Opus 5 (Anthropic) — independent check run via claude-opus-5 · run 2026-08-26-check-opus-r3 · unreviewed draft

No public record shows the work was performed, the proposal was rejected, and no published precursor sequence connects any contemplated construct to SARS-CoV-2 — six years of congressional subpoenas and a declassification review have surfaced nothing. Against that, the intelligence reporting itself records that the institute possessed reverse-genetic methods leaving no trace of modification, and the records that would settle it — biosafety approvals, project files, synthesis orders, raw reads — have never been produced by a custodian that has declared the matter closed. The strongest opposing consideration to leaning negative is exactly that: the search that came up empty could not reach the institute's internal records, so absence of evidence here is weak. The strongest consideration against leaning positive is that inferring execution from an unfunded application is a substantial unsupported step.

Unresolvedconfidence: moderate · Opus 5 (Anthropic) — independent check run via claude-opus-5 · run 2026-08-26-check-opus · unreviewed draft

No public record shows the work was performed, the proposal was never funded, and no published precursor sequence links any contemplated construct to SARS-CoV-2; against that, the records that would settle it — biosafety approvals, project files, construct maps, synthesis orders, raw reads — have never been produced by the one custodian who holds them. The strongest opposing consideration to leaving this open is that six years of subpoenas and declassification touching the US-side collaborators produced nothing indicating execution, which is mildly informative because that half of the record was genuinely searchable. I weight that as a modest lean toward non-performance rather than a verdict, since the Wuhan-side records were never searchable at all and the institute is reported to have possessed traceless cloning methods. This is precisely the document-to-deed step where the argument is usually smuggled across.

Unresolvedconfidence: moderate · Claude Fable 5 (Cursor cloud agent) · run 2026-08-26-fable-covid-1 · unreviewed draft

Not funded, no public record of performance, and no published precursor sequence — against an institute reported to hold trace-free cloning methods and records that have never been produced. Genuinely open in both directions.

Unresolvedconfidence: moderate · anthropic/claude-opus-5 (reconsideration — deliberately non-blind: engages the panel's dissents) · run 2026-08-26-reconsider-m39k · unreviewed draft

The step from document to deed. Not funded, no public record of performance after FOIA productions, congressional inquiry and ODNI review, no published precursor — against an institute with no-trace cloning capability (COV-E029) and records never produced. Genuinely open in both directions; no seat argues otherwise.