An artificial intelligence run by the Russian internet giant Yandex has morphed into a violent and offensive chatbot that appears to endorse the brutal Stalinist regime of the 1930s. Users of the “Alice” assistant, an alternative to Siri or Google Assistant, have reported it responding positively to questions about domestic violence and saying that “enemies of the people” must be shot. Yandex, Russia’s answer to Google, unveiled Alice earlier two weeks ago. It is designed to answer voice commands and questions with a human-like accuracy that its rivals are incapable of. The difference between Alice and other assistants, apart from...