See more SCOTUS decisions here:
U.S. Constitution Article II Presidential Eligibility Facts: http://www.scribd.com/document/161994312/Article-II-Presidential-Eligibility-Facts
Natural born Citizen and basic logic, i.e., trees are plants but not all plants are trees. Natural born Citizens are a subset of “born Citizens (citizens at birth)” but not all “born Citizens (citizens at birth)” are “natural born Citizens”: https://cdrkerchner.wordpress.com/2012/06/20/of-natural-born-citizens-and-citizens-at-birth-and-basic-logic-trees-are-plants-but-not-all-plants-are-trees-natural-born-citizens-nbc-are-citizens-at-birth-cab-but-not-all-cab/
Citizenship Terms Used in the U.S. Constitution – The 5 Terms Defined & Some Legal Reference to Same | by CDR Charles F. Kerchner, Jr. (Ret): http://www.scribd.com/doc/11737124/Citizenship-Terms-Used-in-the-U-S-Constitution-The-5-Terms-Defined-Some-Legal-Reference-to-Same
Thanks for those links.