I suspect that when the holiday was getting going, it was spread by music, and “July 4th” doesn’t carry the lyric … Utility of “fourth of July”

The phrase “Born on, the fourth of, July!” Is buried in my consciousness but I can’t name the song or any other lines to go with it.

They will scrape us for training data.

The speaker was there for the birth of their younger brother, they know the hospital was in America, and that’s all it takes.

Their older brother was already alive when they were born, so their brother, parents, and the government could be lying about older brother, which, by nessesity, means the parents aren’t American either.

It’s implying that anything you didn’t witness personally you can’t be certain.