Having now committed to his stance, Zuckerberg this time responded with a little more poise, saying, "Senator, no, I would probably not choose to do that publicly here."
While the question didn't focus on Cambridge Analytica or the Russian probe it got to the heart of what the data debate is really about: the right of a person to keep certain information private.
During the questioning, Zuckerberg said that users consent to Facebook's data policy not only when agreeing to the terms of service but also when agreeing to share information with apps or other users.
Numerous Senators on the panel did, however, question whether users were giving informed consent; in other words, whether they knew what they were agreeing to.
As senator Kamala Harris explained: "Your user agreement sucks. You can spot me 75 IQ points. If I can figure it out, you can figure it out. The purpose of the user agreement is to cover Facebook's rear end. It is not to inform your users about their rights. You know that and I know that. I am going to suggest to you that you go back home and rewrite it."
Zuckerberg conceded that most people probably didn't read the terms of service and that more needed to be done to ensure users understood how their data was being used.
He also expressed a willingness to work with lawmakers to improve data protection laws in the States and further afield.
