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READ THESE ARTICLES# Definition of *existential quantifier* in English:

## existential quantifier

### noun

LogicA formal expression used in asserting that something exists of which a stated general proposition can be said to be true.

*‘By contraposition and the definition of the existential quantifier, the latter axiom is equivalent to x = x y (y = x).’**‘The epsilon calculus is, in its most basic form, an extension of first-order predicate logic with an ‘epsilon operation’ that picks out, for any true existential formula, a witness to the existential quantifier.’**‘In each case, the proposition expressed is argued to be that which would be expressed if the indefinite determiner were replaced by the existential quantifier.’**‘On this view, existence is no longer seen as a (first-level) predicate, but instead, existential statements are analyzed in terms of the (second-level) predicate is instantiated, represented by the existential quantifier.’**‘Disjunction, implication and the existential quantifier are definable making free use of double negation.’*

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