(<=> (Setterm ?Expr) (And (Term ?Expr) (List ?Expr) (= (First ?Expr) (Quote Setof))))
(= (First ?Expr) (Quote Setof)) (List ?Expr) (Term ?Expr)
(Exhaustive-Subclass-Partition Term (Setof Variable Constant Listterm Setterm Quoterm Logterm Quanterm)) (<=> (Setterm ?Expr) (And (Term ?Expr) (List ?Expr) (= (First ?Expr) (Quote Setof))))