 It isn't really a question of what is possible, it is a question of where the information is most easily accessed. Everything required for pre-ToM operation can be found in "Old Blood." Nothing required for post-ToM "operation" can be found in "Old Blood."  This entire series is woven around a "Pattern". A pattern by definition is predictable. Im not saying that she was being showed the actual future, but what the future is going to be like from the decisions that had been made up to that point.  