Possible Duplicate:
How do you get the last paragon/renegade dialogue option towards the end of the game?
You know, the third one when talking to
The Illusive Man
at the end of the game. My reputation meter looks to be maxed out, or at least fairly close. Is there anything beyond just rep that influences that check? The wiki article on the mission seems to indicate that there is more than just rep, but doesn't elaborate.