What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? exists z_2: U(z_2) -> T_3(z_2). forall z_2: W_1(z_2) or U(z_2). forall z_2: W_1(z_2) -> T_3(z_2).
exists z_2: T_3(z_2).