What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? W_2(a_7). forall x_8: Q_8(x_8) -> W_2(x_8). forall x_8: W_2(x_8) -> Q_8(x_8).
exists x: W_2(x). forall x_8: Q_8(x_8) <-> W_2(x_8). forall x_8: W_2(x_8) <-> Q_8(x_8).