I just want to point out that "testified in-front of Congress" seems to have no relation to the truth of any statement. I don't recall the last time (if ever) there have been legal ramifications for lying in front of Congress.
Zuckerberg also testified that shadow profiles don't exist and that users can always remove their personal information from Facebook (they do exist, and you can't). James Clapper testified that the NSA doesn't "wittingly" surveil hundreds of millions of Americans (they do, very "wittingly").