internet are interested in what is happening that thesis affect the political conversation and cason steen'sbook republic dhaka, cannot and there was a 2.0 version of it introduced the idea of the echo chamber itself selecting enclaves on the internet just as a general concern. how would you present your thesis next to sunstein on republic.com? >> guest: especially in the first round people are most familiar with talking about the sort of explicit self selection. i am a neo-nazi who is going to the news online and even getting indoctrinated, amping myself up and i can exclude the whole rest of the world the first thing that's different about this is that its fourth pass of experience people don't have to know they are shaping to see what they see increasingly they visit websites and it needs to be relevant or interesting you see the editing and that is important because of understanding with the editorial sensitivity is important. if you are trying to see what the world is, knowing yes i'm looking at this firm fox news not about obama i should make sure i'm not looking at is that msnbc, so t