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: forall x_12: R_12(x_12) or S_12(x_12). R_12(a_12) -> u_1. S_12(a_12) -> u_1. u_1 -> u.
R_12(a_12) -> u can be inferred via the transitivity rule. S_12(a_12) -> u can be inferred via the transitivity rule.