The actual discussion will also improve recall, because you are recalling the information in many ways, and exercising your mental model of it. The process of d

The actual discussion will also improve recall, because you are recalling the information in many ways, and exercising your mental model of it. The process of discussion gives you practice in recalling and using the information. You may also learn something from the discussion itself, become aware of gaps, fill those gaps, get addition points of view and ways to think about it, reasons for holding opinions, which ones seem right but are wrong and why (and which ones seemed stupid at first but - dramatically - aren't). The social aspect, and the competitive aspect, will help you engage. Later, you might even recall some aspects episodically, e.g. "Jones said this, and Bloggs undercut him, and then I showed they were both wrong, and everyone laughed". Memorable. I agree that anticipation of a discussion will also make your preparation for it more effective.