The category error
Why "biolab" is not a single category, and why that matters for evaluating every claim that follows.
Sample chapter. The text below is illustrative; it exists to prove the relationships between chapters, claims, sources and entities.
Four things called “a biolab”
A national reference laboratory that diagnoses tuberculosis, a regional veterinary laboratory that tests livestock, a university institute that studies pathogen genetics, and a facility that produces weaponised agents are all “laboratories that handle dangerous biological material”. They are not the same kind of object. They differ in purpose, oversight, containment level and, above all, legal status.
International public-health cooperation, including the biosafety work supported by the World Health Organization, exists precisely because the first three categories are normal features of any functioning health system.
The legal baseline
The fourth category is prohibited outright. The Biological Weapons Convention bans the development, production and stockpiling of biological and toxin weapons for all States Parties United Nations, Convention on the Prohibition of the Development, Production and Stockpiling of Bacteriological (Biological) and Toxin Weapons and on their Destruction (10 April 1972), Article Iunverified record. UNODA describes it as the first multilateral disarmament treaty banning an entire category of weapons of mass destruction United Nations Office for Disarmament Affairs, Biological weaponsunverified record.
The Biological Weapons Convention was opened for signature on 10 April 1972 and entered into force on 26 March 1975.
Well-established treaty dates. High confidence rests on general knowledge; the linked treaty record still needs its URL confirmed by a human (see source notes).
claim:bwc-entered-into-force-1975
Why the distinction matters
Every subsequent chapter asks the same two questions of every statement: which category of facility is being described, and does the evidence show what the facility is or only what someone says it is?