. >> generational case rather than a feige seÓul hilton verses the w.as a hotel to place, is that a better predictor than knowing if someone's 25455? >> it's a proxy for age. they try to ask questions that don't ask the question they are trying to get at. liberal or conservative or harley were vespa is more fun. >> host: people don't get weird about the answer in a way that would feel -- >> guest: no, it helps get the information out that you need. with the five data points, you can then predict out with 80% accuracy almost any other question when you are saying here are four or five things let's rank them on this person's taste and not only that but if you have to people answering those questions and you know they are friends with a third person and you don't know anything about a third person you can still predict that person with 80% accuracy having gathered these data points. >> it's the social networks we are all part of our exporting information even if i'm not. >> guest: it's one of these things i don't -- i think that people who say privacy is o