Mafia: general discussions.

You don't understand; the vagueness of the description often encourages players to discuss and figure things out, which provides an extra boost to player activity. Moreover, the intrigue can be maintained until the very end of the game, making it even more interesting.
Honestly, it seems like there used to be more vague descriptions. In game 39, for example, we spent almost the entire time guessing the roles, arguing, and coming up with wild theories.
And in my game, it was interesting to watch how everyone kept assigning the role of Hunter to different players. No wonder both games generated a lot of discussion.