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_8: U(x_8) or S(x_8). forall x_8: W(x_8) -> S(x_8). forall x_8: ~U(x_8) or P_4(x_8). forall x_8: ~W(x_8). forall x_8: Q_8(x_8) -> W(x_8). forall x_8: S(x_8) -> Q_8(x_8).
forall x_8: ~Q_8(x_8) can be inferred via the universal modus tollens rule. forall x_8: W(x_8) -> Q_8(x_8) can be inferred via the universal transitivity rule. forall x_8: Q_8(x_8) -> S(x_8) can be inferred via the universal transitivity rule. forall x_8: S(x_8) -> W(x_8) can be inferred via the universal transitivity rule. forall x_8: S(x_8) or P_4(x_8) can be inferred via the universal resolution rule.