[{"role": "user", "content": "I'm trying to understand the nuances of human behavior and I'd love to learn how to express this thought in Italian, so could you please help me translate the sentence 'He must be selfish' into Italian?"}, {"role": "assistant", "content": "The translation of 'He must be selfish' in Italian is 'Lui dev'essere egoista.' This sentence conveys the idea that based on observations or behavior, it is likely that he prioritizes his own interests over others."}]