trailIn a 2024 survey of 168 experts (mostly epidemiologists and virologists), respondents on average assigned substantially higher probability to a zoonotic origin of SARS-CoV-2 (~77%) than to a lab-leak origin (~21%).
SARS-CoV-2 originated through zoonotic spillover at the Huanan Seafood Market in Wuhan
claim · empirical · verifiableA factual claim that could be checked directly against observation or primary records.constitution →claim page ↗︎
In a 2024 survey of 168 experts (mostly epidemiologists and virologists), respondents on average assigned substantially higher probability to a zoonotic origin of SARS-CoV-2 (~77%) than to a lab-leak origin (~21%).
✓VerifiedThe claim traces to reliable primary sources through a clear chain of evidence.constitution →
1depended on by
Bedrock — a verified fact. It is checked directly against sources; nothing lies beneath it.
claimA box is a claim: a single proposition the graph assesses, with its own page and map. Click any claim to centre the map on it.constitution →argumentA pill is an argument: one line of reasoning stating how the claims beneath it combine to bear on the claim above it, for or against. Arguments are not destinations; click their claims to explore.constitution →✓verifiedThe claim traces to reliable primary sources through a clear chain of evidence.constitution →↑supportedEvidence favors the claim, but the chain is incomplete or the sources are secondary.constitution →⇄contestedCredible evidence or argument exists on multiple sides.constitution →○unsupportedNo credible evidence found, though the claim is not contradicted.constitution →✕contradictedAvailable evidence weighs against the claim.constitution →?unknownInsufficient information to assess.constitution →◌unassessedNo current assessment — the Steward prioritises higher-importance claims, so this one is likely still queued.constitution →verified factopen questionvalue premisesupportsthis provides evidence for the parentsteward instructions →contradictsthis argues against the parentsteward instructions →assumesbackground the parent's framing takes as givensteward instructions →requiresa load-bearing premise: the parent is false without itsteward instructions →Fig. — detail falls off with distance; every claim is an address.