What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_16: P_16(x_16) or P(x_16). forall x_16: S(x_16) or ~U(x_16). exists x_16: ~P_16(x_16) or U(x_16). forall x_16: P(x_16) -> S(x_16).
exists x_16: P(x_16) or U(x_16). forall x_16: U(x_16) -> S(x_16).