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: T(z) <-> R(z). exists z: ~R_3(z). forall z: T(z) -> R_3(z). forall z: R_3(z) -> T(z).
exists z: ~T(z) can be inferred via the existential modus tollens rule. forall z: T(z) <-> R_3(z) can be inferred via the universal biconditional introduction rule. forall z: R_3(z) <-> T(z) can be inferred via the universal biconditional introduction rule. forall z: T(z) -> R(z) can be inferred via the universal biconditional elimination rule. forall z: R(z) -> T(z) can be inferred via the universal biconditional elimination rule.