What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? exists x: W(x) <-> W_3(x). forall x: U(x) -> Q(x). forall x: U(x) <-> W_3(x). forall x: Q(x) -> W_3(x). forall x: ~U(x).
forall x: U(x) -> W_3(x). forall x: U(x) -> W_3(x). exists x: W(x) -> W_3(x). forall x: W_3(x) -> U(x). exists x: W_3(x) -> W(x). forall x: ~W_3(x).