I think it is just a matter of time before we have literal ghosts in the machine so you can create an alter ego of yourself that learns from your social experiences and extends a life even if you're no longer in the game or you are no longer alive.

When I lived in Japan in the 1980s, I once was mistaken for Paul Newman, and I didn't have much more hair than I do now. My first reaction was that staying in Japan might be good for my social life.

Never mistake a clearer view for a short distance just because the technology looks like it's about to arrive in the very near future. Chances are there will be some surprises and in the long run even the most expected of futures tends to arrive late and in completely unexpected ways.

I would say digital technology probably doesn't have much impact on us so far. We've seen photographs of people from when they are alive. We see home movies. We have videotapes now and e-mails. When it's going to get interesting is in massively multiplayer online games where you have avatars (online personas). You could actually create an avatar that's semi-autonomous. It could do things for you while you get off the game to run the rest of your life.

It's interesting to see the lament of each generation overwhelmed by the next new tool. I can show you passages from scholars of Germany in the 1480s lamenting the fact that they are overloaded with all this stuff to read because of the printing press.

Any thinking person is qualified to be a forecaster, and in fact, everybody does it every day.

The value of a social network is defined not only by who's on it, but by who's excluded.