This is what Vivek's engineering note had described. This is what the architecture guaranteed.Which was why, on a Thursday in May, Navneet and Simran had a phone call in which they both described, separately, their respective conversations from the previous night, and stopped speaking when they both arrived at the same point."He asked me about Maa's blood pressure," Navneet said. "The specific reading. From Tuesday.""He asked me too," Simran said."How did your version know?" Navneet said. "I didn't put anything medical in my upload. Did you?""No," Simran said.Silence on the phone."The same number?" Simran said. "The same reading?""145 over 92," Navneet said."145 over 92," Simran said.They were both quiet for a long time."Coincidence," Navneet said."Yes," Simran said.Neither of them believed it.