MBED-EXISTENTIAL : WFFOPMBED-EXISTENTIAL is a wff operation.
Embed the current edwff in the scope of a existential quantifier.
The variable of quantification is provided by the user.
The calling scheme for MBED-EXISTENTIAL is:
(MBED-EXISTENTIAL VQUANT CRWFF)
The result is of type GWFF0.
The arguments have the following meaning:
VQUANT : Variable of Quantification
CRWFF : Wff to quantify
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