Fundamental truths are easy to recognize because they are verified daily through simple observation and thus, require no testing.
Working at Republic Steel for 10 years, until its closing in 1983, the best line I ever heard there was when this young black kid was being reprimanded for the last time before being fired.
Predictably, the black youth said to the shop foreman, "You're firing me because I'm black!"
The boss said, "No, we hired you because you were black. We're firing you because you are useless!
The same goes for the President of the United States