Unclear on the Concept

Fearless Leader wants to put us all in our place, tweeting us that

"Unless you're a Native American, you came from someplace else."--tweet, @whitehouse, May 8

Now, to be a native of some place you must have been born in that place, so the tweet is self-contradictory.

But let us suppose good ol' @whitehouse really meant "unless you're an American Indian (Amerind)" and was merely employing the incoherent vocabulary forced upon devotees of delicate speech.

In that case, it is also an improper proposition.  TOF is not a Native American in that sense, but does "come from" the very place from which he is this very moment blogging; viz., a quondam mill town on the Pennsylvania-Jersey border.  This falsifies the proposition.  (modus tollens)  QED and up your nose.

But perhaps @whitehouse meant one's ancestors came from somewhere else - save for the Amerinds.  This raises all sorts of worrisome thoughts about Rasenwissenschaft and Blood, soil, and honor. Why should it matter where from and when one's ancestors came?

Then the tweet is also historically incorrect.  Because the ancestors of the Amerinds also came from someplace else (i.e. NE Siberia across the Bering Land bridge some 20,000 years ago).

But perhaps it meant to say that everyone in America has ancestors who came from somewhere else, with magic exemptions given to Amerinds, Athapaskans, and Eskaleuts.

In that case, it is merely a fatuous tweet - but I repeat myself.  Pretty much everyone everywhere has ancestors who came from elsewhere.  Arabs in the Middle East came from Arabia; Peninsular Arabs claim the Yemen as their origin.  Genetic evidence suggests proto-Australoids canoing out of Africa along the coast as the original Yemenis.  (They also dropped their genes in southern India, Thailand, Indonesia, New Guinea, the Philippines, Japan (Ainu), and likely account for the Pre-Siberian American Aborigines.)

The C-route is that of the proto-Australoids