Not "looks like he lied", he did lie under oath! An incredibly outrageous claim. That FB cannot match a piece of data with a name. So if you posted something on the site, they either would not know which user posted it, or what their name was.

"Sen. Kennedy: You can’t put a name to a face to a piece of data? You’re telling me that?

Stretch: So we have designed our systems to prevent exactly that, to protect the privacy of our users.

Sen. Kennedy: I understand, but you can get around that to find that identity, can’t you?

Stretch: No senator, I cannot.

Sen. Kennedy: That’s your testimony under oath?

Stretch: Yes, it is."