refocus the discussion and debate but needs to be done with powerful openness and engagement with the critics. todd: here is more from was a lower sophie saying, although i made the best decision i could based on the knowledge available at the time ultimately i was the one who made the decision not to push more or prioritize further in each case and i know i have blood on my hands. you alluded to this but is that guilt a pervasive sentiment inside facebook? >> i don't think so. this deep appreciation and there should be a deep appreciation that connecting the world is on balance a positive mission but the amplification of misinformation, and something the research does show and the company has to pay less attention to and embrace part of its mission and to the extent they want to say it is not our fault or our responsibility, they've taken on their responsibility and need to do it forthrightly and quite a number of people in the company are