
Continuity mistake: In the end, when the President is visited by the X-Men, he receives a blue binder, which is laid in front of him on the table. When they have left, you see a shot including the President's desk, and you can see that the only thing he has on the table are some sheets of paper, stapled in the upper left corner, opened up. Then the shot changes to a close-up of the President, and then back again, and you see the blue binder in front of him, closed, and the papers have disappeared. (02:01:40)
Answer: The Phoenix Force is a primal force of the universe and Jean is tapping into it. As such, she's heading for a point where she really doesn't have any limitations - in the comics, Phoenix destroyed an entire star system. A degree of precognition doesn't seem remotely out of the question.
Tailkinker