You are not safe in science; you are not safe in history. . . . All metaphor breaks down somewhere. That is the beauty of it. It is touch and go with the metaphor, and until you have lived with it long enough you don't know where it is going. You don't know how much you can get out of it and when it will cease to yield. It is a very living thing. It is life itself .
We are shown the promise and potential, but not the consequences :
The United States Department of Education and the White House formally kicked off a new national center Friday whose aim is to identify, test, and help bring to market promising education technologies.