"So she has told you some of it," I observe. Though not all of it, clearly. I can't stop thinking of the Tris I've left behind back in Chicago - the one laying cold in the morgue. But I don't want to upset any friend of Tris, especially at her own birthday party. So I leave it be. "Foolish and cruel, certainly," I agree, though it's too simple an explanation to really describe the entire experience. Like the rest of us, in the end, they had all been experiments too. "They knew how to use that combination to their advantage."