What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: exists z: R(z) -> Q(z). forall z: Q(z) <-> R(z).
forall z: Q(z) -> R(z) can be inferred via the universal biconditional elimination rule. forall z: R(z) -> Q(z) can be inferred via the universal biconditional elimination rule.