“I’m curious about the possibility of separating the twins,” Arty said. Dr. Phyllis grunted. “Can’t be done. I told you that years ago.” Arty yawned, wiggling. “Well, I thought you’d be keeping up with new techniques and developments.” Doc P. was not to be goaded. “Nothing to do with technique. It’s the way they’re built.” Arty flipped over on his belly and looked straight at her. “What if I was willing to sacrifice one twin to keep the other?” “Which one?” inquired Dr. Phyllis sweetly. Arty smiled. “It doesn’t matter.”