What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? exists x_7: P_3(x_7) or ~Q_4(x_7). forall x_7: ~P_7(x_7). forall x_7: P_7(x_7) or Q_4(x_7).
forall x_7: Q_4(x_7). exists x_7: Q_4(x_7) -> P_3(x_7).