[ROCKLOBSTER]

how would we really know and prove that the guy in the White House is really Dunham's child, that this nut in the White House didn't just assume the identity of Barack Obama?

Well...DNA.

[Tau Food]

Well, possibly, but keep in mind that mom and dad are dead. It won't be easy and if we've learned anything from these questions about Obama's qualifications, there is always a basis for another question about any fact that you might think you've established.