For this reason it is vitally important, especially as one gets older, to ask for exactly what you want for Christmas, whether it be a unicorn that really talks or an artificial intelligence that will not destroy the world or a new job or someone to love you despite your being a know-it-all or a teddy bear or universal health care or the ability to finish things you start. Santa Claus does not judge wishes. He only wants you to be happy. He can’t do everything—he is only a construct, not a constant.

