What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_8: P(x_8) -> Q_1(x_8). forall x_8: ~Q_1(x_8). exists x_8: Q(x_8) <-> P(x_8).
forall x_8: ~P(x_8). exists x_8: Q(x_8) -> P(x_8). exists x_8: P(x_8) -> Q(x_8).