What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? p_8 -> R_17(f). S_17(f). S_17(f) -> p_8. forall x_17: R_17(x_17) -> S_17(x_17).
S_17(f) -> R_17(f). exists x: S_17(x).