What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_13: U(x_13) or ~Q_13(x_13). forall x_13: Q_1(x_13). exists x_13: Q_13(x_13).
exists x_13: Q_13(x_13) and Q_1(x_13). exists x_13: Q_1(x_13) and Q_13(x_13). forall x_13: Q_13(x_13) -> U(x_13).