I knew the girlfriend in the movie was an invention. And the closing-off moment of Zuck's trying to win back her favor after he's lost his best friend was a last-ditch attempt to win audience sympathy for him. Bah.

But however fictional it may be, both in fact and even in concept, the opening conversation is, I thought, a brilliant depiction of the idea of the nerd mind. Movie-Zuck is totally tone-deaf to conversational nuance, while being sensitive enough to realize when he's gone wrong somewhere, and also desperate enough to win the woman's favor to acknowledge it - a combination unlikely to be found to such an extent in any real person - and it's fascinating to watch him back up when she gets angry, trying to feel his way back without having any idea of where he's going.

Another oddity is the handling of the aftermath of Sean Parker's bust for cocaine. The movie cuts to Zuck being asked in deposition what happened, and he says merely that Sean still owns a large share of the stock, which was true; what isn't revealed, and only implied by the implication of what Zuck doesn't say, is that, like Eduardo before him, Sean was kicked out of Facebook management at the insistence of investors.