“Now it is said we need a ruling to say what was is NOT a natural born citizen. Maybe you should take a class in set theory for that answer.”
The logic is pretty simple. If you want to argue that someone is not a natural-born citizen, a declaration that certain people are natural-born citizens is not what you need. That all A is B does not imply that all B is A. You simply get a big red X through your homework.
We have a ruling that a "born citizen" is not a "natural born citizen." Rogers v Bellei.
Therefore, if A > B then B != A.