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: R_17(a_17) -> w_2. forall x_17: R_17(x_17) or S_17(x_17). w_2 or ~S_17(a_17).
S_17(a_17) -> w_2 can be inferred via the rewriting rule.