Nate Fairchild had just instructed his eighth grade students to write a summary of a disturbing passage from Elie Wiesel’s Holocaust memoir Night when he dropped a surprise: He’d customized a chatbot to help them by masquerading as the Nobel Prize-winning writer and answering their questions. “Is that gonna get weird?” Fairchild asked, then answered his own question. “I don’t know, maybe! If it does get weird, let me know.”If the students in his literature class found the prospect of chatting wi...