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: W_4(x_3). forall x_3: W_4(x_3) -> R_3(x_3). exists x_3: Q_4(x_3) -> Q_3(x_3). forall x_3: Q_3(x_3) -> R_3(x_3).
forall x_3: R_3(x_3) can be inferred via the universal modus ponens rule. exists x_3: Q_4(x_3) -> R_3(x_3) can be inferred via the existential transitivity rule.