Can You Undo the First Two Wishes?

If we give a machine an objective which is different from what we really want, then we basicly like creating a chess match with ha machine. So it's kind of like having a chess match for the whole world. And those ways may make you very unhappy. A simple way to cure cancer and humans is not to have any humans. The problem with superintelligent a i is that you might not be able to have that third wish, or eveneven a second wish.