You’ll find that there were plenty of statements that were on the line, crossed it or omitted key detail.
Saying ‘I don’t know’ is also a lie if you do know, and there was a lot of that.
Eh, you can choose to believe Zuckerberg here. I personally have no faith Facebook will voluntarily permanently delete someone's data when they close an account. They have shown very little prior behavior that would lead me to find his statements on this to be trustworthy.
Then again, it's American congress, and what's the stat, how many of those congresspeople has he "donated" to?