> That would be like saying, a few years before the Wright brothers, that human powered flight is a sci-fi notion. That would have been exactly correct at the

> That would be like saying, a few years before the Wright brothers, that human powered flight is a sci-fi notion. That would have been exactly correct at the time. The difference between real and sci-fi is implemented technology. There are certainly classes of sci-fi technology that we know are likely impossible fantasies, but that doesn't mean the rest of it is real.