this is a tool that does at least allow you to say i want to hear from -- i follow karl rove and rachel pat-downand "the new york times" and together i'm going to get a kind of sense of what is going on. >> host: the twitter stream, if i follow someone comment witter isn't affecting the austria but they are manipulating the search which is a lot of the way the people -- the phenomenon of google and climate change and maybe get results that are for people like me can now move to twitter bugling climate change and getting a tweet from people. >> host: there are no skeptics because i don't find --. it's useful to all of us to see that, to be reminded that and actually understand those arguments if we have a and i mean that button or some -- >> host: it sounds like my expressed preferences i should actually be allowed to override my own personality with an expressed preference of i want to. it's let me turn on or off your behavioral rating of me. sometimes i just want to come home and veg out in front of the tv and you do your best to show me videos i think are going to be funny and i will keep watc