Since he was three he has “thought like a lawyer,” quick to notice fine points and make subtle distinctions. He is concerned about the suffering of others and polite, kind, and considerate—except, perhaps, when he is overcome by too much stimulation. His sister, meanwhile, has her own numerous virtues. One is that she is a steady sort, the anchor in her brother’s life. What makes Rob and Rebecca so very different from each other? What makes you answer yes to so many items on the self-test at the beginning of this book when most people would not?
