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