A year ago, a chatbot tried to break up Kevin Roose’s marriage. Ever since, chatbots haven’t been the same. We’ll tell you how. Then, we’ll talk through the latest ways the world is adapting to artificial intelligence. And finally, Aravind Srinivas, the chief executive of Perplexity, will discuss his company’s “answer engine,” a challenger to Google’s search engine that could reshape the web as we know it.Today’s guest:Aravind Srinivas, chief executive of Perplexity Additional Reading: The Year Chatbots Were TamedOpenAI Gives ChatGPT a Better ‘Memory’Google Releases Gemini, an A.I.-Driven Chatbot and Voice AssistantSam Altman Seeks Trillions of Dollars to Reshape Business of Chips and AILawmakers propose anti-nonconsensual AI porn bill after Taylor Swift controversySarah Silverman’s lawsuit against OpenAI partially dismissedCan This A.I.-Powered Search Engine Replace Google? It Has for Me.We want to hear from you. Email us at hardfork@nytimes.com. Find “Hard Fork” on YouTube and TikTok..