Needless to say, if you find that you are qualifying yourself to a girl- giving direct answers to her shit tests, doing try-hard demonstrations of higher value, etc., then there’s a good chance that the scene is dead. Not saying that you won’t be able to recover, but you’d better be very good at re-framing.
In this case it is better to just shut up before you say something stupid. Focus on your breathing or something like that. Don’t ever let yourself get to the point where you are qualifying to her. If you are persistent in your game practice, your skill will most likely evolve to a level where you don’t need to keep track of this kind of thing. For now, be pro-active in paying attention to when you are getting nervous. It’s got to be about you first and foremost.