What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? r_2 -> P_4(h_2). S_17(h_2) <-> r_2. forall x_17: P_4(x_17) -> S_17(x_17).
S_17(h_2) -> r_2. r_2 -> S_17(h_2).