Asking questions is the easiest. ELIZA, perhaps the earliest chatbot worked by asking questions. It was really simple: ask a question, wait for an answer, pick

Asking questions is the easiest. ELIZA, perhaps the earliest chatbot worked by asking questions. It was really simple: ask a question, wait for an answer, pick a part of that answer and ask a question about it, do it again and again. It looked sentient, or at least as much as a program from the 60s can be, because the human actually made all the conversation.