What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: forall x_3: ~Q_4(x_3). forall x_3: P_3(x_3) or Q_4(x_3). exists x_3: ~P_3(x_3) or R_1(x_3).
exists x_3: Q_4(x_3) or R_1(x_3) can be inferred via the existential resolution rule.