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_13: R(x_13) -> P_13(x_13). forall x_13: P_6(x_13) or R(x_13). forall x_13: P_13(x_13) <-> W(x_13). forall x_13: ~P_6(x_13) or Q(x_13). forall x_13: Q(x_13) -> Q_7(x_13). forall x_13: Q_7(x_13) -> W(x_13).
forall x_13: Q(x_13) -> W(x_13) can be inferred via the universal transitivity rule. forall x_13: R(x_13) or Q(x_13) can be inferred via the universal resolution rule. forall x_13: P_13(x_13) -> W(x_13) can be inferred via the universal biconditional elimination rule. forall x_13: W(x_13) -> P_13(x_13) can be inferred via the universal biconditional elimination rule.