"I don't pretend to understand the way they've tried to run our city and govern us," she says, trying not to think about how, in the end, Chicago ultimately did Tris the ultimate harm. "But growing up in the Factions, that was normal for us. I didn't question it until I met Tris, really. She opened my eyes in a lot of ways." His next question causes her expression to turn grim. "They did," she says, carefully. "They used a serum on us to control our wills. And then they set us loose on Abnegation. Tris' original Faction."

I don't elaborate beyond that; surely, he can read in my expression just what is I've done.