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: W(x). forall x: Q_2(x) -> U(x). forall x: W(x) -> Q_2(x). u_2 -> ~U(a_9).
forall x: Q_2(x) can be inferred via the universal modus ponens rule. forall x: W(x) -> U(x) can be inferred via the universal transitivity rule.