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: Q(x) -> R(x). forall x: P_3(x) -> R(x). forall x: P_3(x) or Q(x).
forall x: R(x) can be inferred via the universal disjunction elimination rule.