What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? q_1 -> R_2(a_17). S_17(a_17) -> q_8. ~S_17(a_17). forall x_17: R_2(x_17) -> S_17(x_17). q_8 -> q_1.
S_17(a_17) -> q_1. q_8 -> R_2(a_17).