[{"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 'Deve essere egoista.' This sentence implies that based on the person's actions or behavior, it can be inferred that they are selfish."}]