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_19: R_19(x_19) -> S_19(x_19). q -> S_19(a_19). w or ~S_19(a_19). q or R_19(a_19).
S_19(a_19) -> w can be inferred via the rewriting rule. R_1(a_19) -> q can be inferred via the rewriting rule.