. >> host: so you believe what you see what you are saying that the feedback now increasingly throopearch and personalization what you believe is they can inferred your belief, what you see contrast, darbee leaves contract and what you see. so i go home and i find people on atwitter who are on the areas i care about, but twitter is not yet a news feed all the wood has some of those characteristics, and i think about the source of personalization which is a google news, yahoo! which are doing these kind of filtering. if i were to change my news what to buy two? >> guest: i think twitter does most of the proxy for news and most agencies are on the twitter and actually i think that google news has wrestled with these problems more than other parts of google. they thought about this and because its -- people think of it as a kind of machine news, the dirty secret is a totally won't work as soon as the newspaper editors go away. it weighs what the newspaper editors judgments are very highly and even the placement on the page and what the font size is to all of that, those are human judgme