What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_2: ~P_2(x_2) or P(x_2). exists x_2: P_2(x_2) or Q_1(x_2). forall x_2: ~Q_1(x_2).
exists x_2: Q_1(x_2) or P(x_2).