ME:A has a very nice UX improvement over the previous ME games: dialogue options which you have already read are a different shade. This is very helpful, since I have wasted a lot of time in the previous games redoing dialogue because I couldn't remember from the blurb whether I'd already used it. For example, (4) here is an as-yet-unvisited option, whereas (1), (3), (7) and (9) have been done:
However, this brings up a new problem: it's possible that a given dialogue option may result in a different dialogue further down the storyline. Does such a case exist? If yes, does the dialogue option change back to the "unread" display?