dest_pforallpairSyntax.dest_pforall : term -> term * term
Breaks apart paired universal quantifiers into the bound pair and the body.
dest_pforall is a term destructor for paired universal
quantification. The application of dest_pforall to
"!pair. t" returns ("pair","t").
Fails with dest_pforall if term is not a paired
universal quantification.
boolSyntax.dest_forall,
pairSyntax.is_pforall,
pairSyntax.strip_pforall