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{{#invoke:Hatnote|hatnote}} A fact is something that has really occurred or is actually the case. The usual test for a statement of fact is verifiability—that is, whether it can be demonstrated to correspond to experience. Standard reference works are often used to check facts. Scientific facts are verified by repeatable careful observation or measurement (by experiments or other means).

Fact sections
Intro   Etymology and usage   Fact in philosophy  Fact in science   Fact in history   Fact in law  Authoritative compendiums of facts  See also  References  

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