src/FOL/fologic.ML

   val mk_conj		: term * term -> term
   val mk_disj		: term * term -> term
   val mk_imp		: term * term -> term
   val dest_imp	       	: term -> term*term
   val dest_conj         : term -> term list
-  val dest_concls       : term -> term list
   val mk_iff		: term * term -> term
   val dest_iff	       	: term -> term*term
   val all_const		: typ -> term
   val mk_all		: term * term -> term
   val exists_const	: typ -> term

   | dest_imp  t = raise TERM ("dest_imp", [t]);
 
 fun dest_conj (Const ("op &", _) $ t $ t') = t :: dest_conj t'
   | dest_conj t = [t];
 
-fun imp_concl_of t = imp_concl_of (#2 (dest_imp t)) handle TERM _ => t;
-val dest_concls = map imp_concl_of o dest_conj o dest_Trueprop;
-
 fun dest_iff (Const("op <->",_) $ A $ B) = (A, B)
   | dest_iff  t = raise TERM ("dest_iff", [t]);
 
 fun eq_const T = Const ("op =", [T, T] ---> oT);
 fun mk_eq (t, u) = eq_const (fastype_of t) $ t $ u;