 I would be happy to hear of such a way if you can contrive one. At the moment, it seems to me that one of us must be killed. Uncle. All right, then. Send this. Look here, out there, whoever you are. It looks like we have to fight, and one batch of us gets killed. All right, we're ready if we have to. But if you win, we've got it fixed so you'll never find out where Earth is.