action;
That's not true. Seven is an informality, isn't it? A nonsensical shortening of your entire title?
[ It's a curiosity, and he phrases it as one. He doesn't understand, and he's asking Seven why this specific informality brings her discomfort. But he adds: ]
If you'd prefer to call me Commander Riker, I won't stop you, I'd only like to know what part of it makes you uncomfortable.
[ To tell the truth, not being a member of Starfleet will probably be her saving grace once she returns home. It makes her a civilian, and civilian rights are out of Starfleet jurisdiction. ]