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: forall z: U(z) -> P(z). forall z: P(z) -> U(z). U(d) -> R_10(a_10). forall x_10: ~R_10(x_10).
forall z: U(z) <-> P(z) can be inferred via the universal biconditional introduction rule. forall z: P(z) <-> U(z) can be inferred via the universal biconditional introduction rule.