how seriously should we take her warning? >> incredibly seriously. because, look, i think if you look at the way our collective politics have gone insane over the last several years. there are a lot of macrofactors but one of the clear drivers that has made your -- your sort of random aunts and uncles, all the sudden, come to the it can table armed with conspiracy theories and alternative facts is their facebook feed. and i think every case can be made that facebook has hit sort of a big-tobacco moment where their own internal research and data shows they knew this algorithm was a problem and while section 230 should protect platforms from anything some random person might post on their site to a large extent. the algorithms are the decisions of the own companies, and by optimizing for engagement, they en ended up rewarding the most negative and extreme content and that has helped political extremism which has disfigured our democracy. sometimes with deadly results.