What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? exists x_6: U_3(x_6). forall x_6: Q_6(x_6) or Q_4(x_6). forall x_6: W(x_6) or ~Q_6(x_6). forall x_6: Q_4(x_6) -> W(x_6).
forall x_6: Q_6(x_6) -> W(x_6).