What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_12: U_4(x_12) or S_12(x_12). q_2 -> w. S_12(a_12) -> q_2. U_4(a_12) -> q_2.
S_12(a_12) -> w. U_4(a_12) -> w.