What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_4: ~Q(x_4). forall x_4: Q(x_4) -> T(x_4). exists x_4: T(x_4) -> Q(x_4). forall x_4: U(x_4) <-> T(x_4).
exists x_4: ~T(x_4). exists x_4: T(x_4) <-> Q(x_4). exists x_4: Q(x_4) <-> T(x_4). forall x_4: U(x_4) -> T(x_4). forall x_4: T(x_4) -> U(x_4).