“Can a minor forfeit...?”
YES. Contrary to oft repeated lies the answer is YES.
In fact, to be an internationally recognized Indonesian Citizen Obama would have HAD to give up is US citizenship. Hence why he likely HAD to come off his mothers passport in 1968.
The act of formal naturalization is one that is a legal trump card in the nbC debate.
If, as Sven notes and consistently claimed for years, Obama formally and explicitly NATURALIZED to regain US citizenship then he IS definitely NOT currently (even if he was) a “natural born” Citizen.
At any one point in time you can be a “natural born” or “naturalized”. But the two are mutually exclusive at any one point in time.
The formal act of legal naturalization would eradicate all other factors in the nbC discussion. It would be cut and dry that Obama was not eligible according to Article II, Section 1.
Its that simple.
Just my opinion:
If BO can be shown to be an Indoniaian Citizen at any time, would not the onus be on BO to prove otherwise. He can’t use the BC. He sure as hell will not declare he Naturalized(as you and others have explained. So the issue is not to get his BC. It is to prove he was an Indo citizen or even a Brit.