strip_pforall : term -> term list * term
STRUCTURE
pairSyntax
LIBRARY
pair
SYNOPSIS
Iteratively breaks apart paired universal quantifications.
DESCRIPTION
strip_pforall "!p1 ... pn. t" returns ([p1,...,pn],t). Note that 
   strip_pforall(list_mk_pforall([p1,...,pn],t))
will not return ([p1,...,pn],t) if t is a paired universal quantification.
FAILURE
Never fails.
SEEALSO
strip_forall, dest_pforall
HOL  Kananaskis-14