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_1: Q(x_1) -> Q_1(x_1). forall x_1: P_3(x_1) -> Q(x_1). forall x_1: Q_1(x_1) -> R_1(x_1).
forall x_1: Q(x_1) -> R_1(x_1) can be inferred via the universal transitivity rule. forall x_1: P_3(x_1) -> Q_1(x_1) can be inferred via the universal transitivity rule.