What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? exists x_11: Q_4(x_11). forall x_11: P(x_11) -> ~Q_4(x_11). forall x_11: U_2(x_11) <-> P(x_11).
exists x_11: ~P(x_11). forall x_11: U_2(x_11) -> P(x_11). forall x_11: P(x_11) -> U_2(x_11).