Our founding fathers.
Your answer doesn't even make any sense.
Our founding fathers what?
I'm asking you not Tom Jefferson. I'm asking how realistically speaking (and when someone uses realistically speaking they generally mean 'laying all other arguments aside and getting right down to the nitty gritty') how can the child be described as having loyalties to another country when no such loyalty exists in the child's heart and mind? Just because? Just because it fits the agenda here or what? BS. I don't buy it. If the child isn't loyal to another country he isn't loyal to another country. He doesn't magically become disloyal to the USA just because his unknown parent is suddenly discovered to be Canadian.
And the question still stands even on a hypothetical planet where the USA and Earth has never existed. Lets say we're in China and trying to figure out if a boy is Chinese or not and we don't know if his father was Korean or not (i.e. the Founding Fathers and Constitution don't apply). The same process still stands. And I'm not talking about the legal technicality here. I'm talking about realistically.