Most fundamental imho would be to have technically competent staff who can see through weasel words and tease out real answers, not lies couched in half-truths.

Most fundamental imho would be to have technically competent staff who can see through weasel words and tease out real answers, not lies couched in half-truths. As is generally the case in hearings of this sort. Also I'd like senators to realize that you don't have to click or go anywhere near a like button, for it to track the fact that you visited a site. And all this tracking data is stored somewhere, forever as far as we know. Also I'd like senators to understand that when a user opts in to share some data, they are often being enabled, by the platform, to share data of other users who never did opt in for that particular sharing. (I admit the users' FB friends did opt in to use Facebook, yes... they just didn't opt in with any knowledge of the specific sharing that their friend just did for them). If they understand these things, they can ask better questions.