? It is that none can say before hand which of another person's interests once arisen are good or bad, nor be wise in forbidding lines of inquiry before they can be spoken -- over time and once engaged in a conversation we all can make a reasonable judgment, but not until then.
You also make too settled the meaning that could be given to "natural born". Congress may have made law about it, but until a presidential candidate comes challenged about that exact term before the Supreme Court's bar, no one knows what the Justices will make of it. It hasn't happened yet, I think.
“Let all things be considered, and even strange possibilities considered where an honest good interest lies!”
Let us really dream then, and ponder a truly fantastic possibility - a GOP majority in the Senate in 2009 ushered in when McCain crushes Obama by 20 points.