In the offline world, a big part of personal privacy is simply the freedom to remain a face in the crowd.

The result is that there's an even greater media concentration online than in the offline world.

"Just like in the offline world," he said, "you can't have people running around taking the law into their hands."

Just as in the offline world, be careful with estimates.

He also noted that in the offline world, such sales of data are routine.

In the traditional offline world of selling products there is something known as "minimum viable product."

Which, when you think about it, is pretty much the way it happens in the offline world.

It all got me thinking about how book and movie recommendations work in the offline world.

"It's a lot of effort, and it's really no different from the people you meet in the offline world," she said.

The Internet enables that in a way the offline world doesn't, really.