'Mom, what's the Internet?'Imagine yourself doing your monthly household budget one evening when your four-year-old daughter suddenly walks in asking you that. At that moment, you're busy trying to figure out why you've had more credits than debits on your balance sheet. You felt that your brain is about to short-circuit. And it's past her bedtime.'John Noah Mason Smith, you're forgetting that you're talking to a 60-year-old.'Your grandma calls you...