What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? exists x_13: W_1(x_13) or ~Q_13(x_13). forall x_13: U_1(x_13) <-> Q_13(x_13). forall x_13: R(x_13) -> U_1(x_13).
exists x_13: Q_13(x_13) -> W_1(x_13). forall x_13: U_1(x_13) -> Q_13(x_13). forall x_13: Q_13(x_13) -> U_1(x_13).