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: R(x_3) -> Q_3(x_3). forall x_3: ~R_3(x_3). forall x_3: Q_3(x_3) -> R_3(x_3). exists x_3: R_3(x_3) -> R(x_3).
forall x_3: ~Q_3(x_3) can be inferred via the universal modus tollens rule. forall x_3: R(x_3) -> R_3(x_3) can be inferred via the universal transitivity rule. exists x_3: R_3(x_3) -> Q_3(x_3) can be inferred via the existential transitivity rule. exists x_3: Q_3(x_3) -> R(x_3) can be inferred via the existential transitivity rule.