..... what if the father was not known and the mother is natural born.
Five years ago when there were dozens of threads each day on the "Natural Born Citizen" issue, some here argued, seemingly with a straight face, that an adopted child could never be president because we wouldn't know for certain if his biological parents were citizens or not.
It was always entertaining to watch birthers twist themselves into a pretzel trying to consistently support their logic. Needless to say, there were plenty of claims attesting that a child of unknown paternity was equally ineligible.