Discussion boards have never been about simply posting answers—they've been about making sense of ideas together. In an AI-rich world, that distinction matters more than ever. Rather than making discussion prompts harder, instructors can design discussions that emphasize reasoning, judgment, and meaningful interaction. By focusing on visible thinking, social metacognition, and thoughtful use of AI, discussions can become powerful opportunities for students to challenge assumptions, refine their understanding, and develop the kinds of judgment that AI cannot easily replace.