Who’s your daddy?
And Whos’ your mommy?
http://obambi.wordpress.com/2010/01/05/who%E2%80%99s-your-daddy-who%E2%80%99s-your-mama/
Scenario # 2 makes the case I think its at least a possibility. That grandpap Armour Dunham is that true father and that the mother was probably a Honolulu black whore(recall zero describing himself once as a mutt--perfect description?) whom he had frequent relations with according to rumors.
I hate rumor and innuendo but when you have little else.....