executive inside the company said they were stuck in an untenable decision, defending a decision that to let the president share information. they're in unchartered waters with having a social media platform that encompasses the entire globe. it would be the population of one of the world's largest countries if it was a country. what is your sense of how well facebook is learning to manage misinformation? >> absolutely, joshua. as you said, facebook is in unchartered waters. one of the things that we show is that facebook made the decision to jump into these waters themselves and along the way, they tried to warn facebook. they said, we're seeing problems with misinformation, we're seeing issues around people, especially leaders, government leaders spreading misinformation. we should come up with a policy about this. and, again and again throughout