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WHY OLD PEOPLE LOVE THE TWITTERS: "To a person with short-term memory loss, Twitter serves a vital function: every time the user announces, 'Going across the street to get ice cream,' they notify not only their 30,000-odd 'followers,' but they also establish a record for themselves so that if they end up across the street wondering what on earth they're doing staring at a pint of Haagen-Dazs, they need only check their Twitter status for the magical answer. And then they can 'tweet' about their ice cream, which is important!" [Sara's NBC Gig ]