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What is the shorthand symbol for 'all'?

∀ (the universal quantifier symbol) means “for all” and was first used in the 1935 publication Untersuchungen ueber das logische Schliessen (“Investigations on Logical Reasoning”) by Gerhard Gentzen (1909-1945). He called it the All-Zeichen (“all character”), in analogy with “∃” (read: “there exists”).

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