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_3: W(z_3) <-> Q(z_3). forall z_3: T(z_3) -> Q(z_3). forall z_3: R_3(z_3) or W(z_3). forall z_3: R_3(z_3) -> T(z_3).
forall z_3: R_3(z_3) -> Q(z_3) can be inferred via the universal transitivity rule. exists z_3: W(z_3) -> Q(z_3) can be inferred via the existential biconditional elimination rule. exists z_3: Q(z_3) -> W(z_3) can be inferred via the existential biconditional elimination rule.