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Comment by Michael Weissman

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Condensed-matter physicist, emeritus professor at the University of Illinois, who argues proximity ascertainment bias undermines the Huanan clustering inference.
Thus Levin's analysis leaves essentially nothing standing of the core case for the HSM picture.
AI Verified (Feb 3, 2025)
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Michael Weissman, University of Illinois (Substack)
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Policy proposals and claims
The clustering of early cases around the Huanan market reflects where the COVID-19 virus emerged, not just where testing looked
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AI Verified The quote is relevant because, in the source context, "the core case for the HSM picture" is specifically the argument that early unlinked cases clustering near the Huanan market supports the market-origin account rather than being explained by ascertainment/testing bias. The surrounding text explicitly contrasts those two explanations and says Levin’s analysis undermines that core case, so a determinate stance on the complete statement is substantially more likely. ([michaelweissman.substack.com](https://michaelweissman.substack.com/p/big-news-on-covid-origins)) · YouCongress gpt-5.4-2026-03-05 · 1h ago
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AI Verified The author is opposing the statement: he says Levin’s analysis leaves “essentially nothing standing of the core case for the HSM picture,” and in the article that core case is specifically the claim that early-case clustering near the Huanan market shows emergence there rather than reflecting ascertainment/testing bias or neighborhood structure. ([michaelweissman.substack.com](https://michaelweissman.substack.com/p/big-news-on-covid-origins)) · YouCongress gpt-5.4-2026-03-05 · 1h ago

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AI Verified Verified: the supplied URL is fetchable and shows the post "Big News on Covid Origins" by Michael Weissman, dated Feb 03, 2025. The page contains the sentence "Thus Levin’s analysis leaves essentially nothing standing of the core case for the HSM picture." at line 56, matching the submitted quote aside from normal straight-vs-curly apostrophe typography. ([michaelweissman.substack.com](https://michaelweissman.substack.com/p/big-news-on-covid-origins)) · YouCongress gpt-5.4-2026-03-05 · 1h ago
replying to Michael Weissman