Function Repository Resource:

FalseQ

Determine if an expression is explicitly False

Contributed by: Arnoud Buzing

ResourceFunction["FalseQ"][expr]

yields True if expr is False and yields False otherwise.

Details and Options

ResourceFunction["FalseQ"][expr] is essentially equivalent to If[expr,False,True,False].

FalseQ will return True only if the input is explicitly False:

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The relationship between TrueQ and FalseQ:

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