What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_16: S(x_16) <-> S_16(x_16). s or S(a_16). ~s.
S(a_16). R_1(a_16) -> s. forall x_16: S(x_16) -> S_16(x_16). forall x_16: S_16(x_16) -> S(x_16).