This has SO MUCH POTENTIAL, especially in the X-and-higher generation. Imagine a larger set of keywords, but with fewer "?" responses, and the ability to ask any NPC about them for a variety of dialogue. Imagine if the datalog in XIII had instead been integrated into conversations with NPCs. (Or rather that it fills up as a consequence of dialogue with NPCs, so you have to talk to learn but then can always go back and refer to what you learned through earlier conversation.)