What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_12: R_12(x_12) or S_12(x_12). R_12(a_12) -> w. S_12(a_12) -> w. w -> u_2.
R_12(a_12) -> u_2. S_12(a_12) -> u_2.