don't think machines can do yet. at scale, you can take all of the human judgments and try to do something that gets it right most of the time. >> these questions like machine learning to curb harassment, these are large issues that big tech companies are taking on. it's fascinating to watch instagram prioritize this. they're looking at mental health of the users. looking at the larger social responsibility now that we have seen some of the dak side rk si technology. >> facebook who owns them rethinking the mission. >> absolutely. i spoke to mike about changing instagram's mission. it used to be about connecting people to having different pictures. now it's about strengthening relationships. you hear the world putting humanity back in technology quite a bit from the big tech founders. there's a reason for that. >> it's more than just selfies. a lot of it is still selfies. >> i don't sleep enough because i sit there scrolling.