Jobs’s sensibility was editorial, not inventive. His gift lay in taking what was in front of him—the tablet with stylus—and ruthlessly refining it. After looking at the first commercials for the iPad, he tracked down the copywriter, James Vincent, and told him, “Your commercials suck.”

“Well, what do you want?” Vincent shot back. “You’ve not been able to tell me what you want.”

“I don’t know,” Jobs said. “You have to bring me something new. Nothing you’ve shown me is even close.”

Vincent argued back and suddenly Jobs went ballistic. “He just started screaming at me,” Vincent recalled. Vincent could be volatile himself, and the volleys escalated.

When Vincent shouted, “You’ve got to tell me what you want,” Jobs shot back, “You’ve got to show me some stuff, and I’ll know it when I see it.”

I’ll know it when I see it. That was Jobs’s credo, and until he saw it his perfectionism kept him on edge. He looked at the title bars—the headers that run across the top of windows and documents—that his team of software developers had designed for the original Macintosh and decided he didn’t like them. He forced the developers to do another version, and then another, about twenty iterations in all, insisting on one tiny tweak after another, and when the developers protested that they had better things to do he shouted, “Can you imagine looking at that every day? It’s not just a little thing. It’s something we have to do right.”

1. Reporters -- who go out and do first person reporting -- creating original stories, not just reposting rewritten wire copy.
2. Columnists -- who "start conversations and give stories another perspective."
3. Curators -- who "'cover' the news by sorting, verifying and editing live everything good existing on the web and in the media. They make link journalism, they make the news more accessible."