What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall z_2: R_3(z_2) -> T(z_2). forall z_2: T(z_2) -> R(z_2). exists z_2: U(z_2) or ~R(z_2). forall z_2: R(z_2) -> R_3(z_2).
forall z_2: R_3(z_2) -> R(z_2). forall z_2: T(z_2) -> R_3(z_2). forall z_2: R(z_2) -> T(z_2). exists z_2: R(z_2) -> U(z_2).