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: exists x_1: Q_1(x_1) -> R(x_1). forall x_1: W_2(x_1). forall x_1: W_2(x_1) -> R(x_1).
forall x_1: R(x_1) can be inferred via the universal modus ponens rule.