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_3: S_4(z_3) <-> T_4(z_3). forall z_3: W(z_3) -> T_4(z_3). exists z_3: T_4(z_3) -> W(z_3). forall z_3: ~S_4(z_3).
exists z_3: T_4(z_3) <-> W(z_3) can be inferred via the existential biconditional introduction rule. exists z_3: W(z_3) <-> T_4(z_3) can be inferred via the existential biconditional introduction rule. forall z_3: S_4(z_3) -> T_4(z_3) can be inferred via the universal biconditional elimination rule. forall z_3: T_4(z_3) -> S_4(z_3) can be inferred via the universal biconditional elimination rule. forall z_3: ~T_4(z_3) can be inferred via the universal biconditional elimination rule.