mk_exists
boolSyntax.mk_exists : term * term -> term
Term constructor for existential quantification.
If v is a variable and t is a term of type bool, then
mk_exists (v,t) returns the term ?v. t.
Failure
Fails if v is not a variable or if t is not of type bool.
See also
boolSyntax.dest_exists,
boolSyntax.is_exists,
boolSyntax.list_mk_exists,
boolSyntax.strip_exists