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_15(a_15) or ~w_4. ~S_15(a_15). forall x_15: R_15(x_15) -> S_15(x_15).
w_4 -> R_15(a_15) can be inferred via the rewriting rule.