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_6: S(x_6) -> Q_2(x_6). forall x_6: Q_6(x_6) -> W(x_6). forall x_6: S(x_6) -> Q_6(x_6). forall x_6: ~Q_2(x_6). forall x_6: W(x_6) -> S(x_6).
forall x_6: ~S(x_6) can be inferred via the universal modus tollens rule. forall x_6: Q_6(x_6) -> S(x_6) can be inferred via the universal transitivity rule. forall x_6: S(x_6) -> W(x_6) can be inferred via the universal transitivity rule. forall x_6: W(x_6) -> Q_2(x_6) can be inferred via the universal transitivity rule. forall x_6: W(x_6) -> Q_6(x_6) can be inferred via the universal transitivity rule.