That's easy: you don't have to check them.
"Prove the theory of relativity."
"All right, here's the proof. Light never accelerates, and is thus always constant, and blah blah blah..."
"Prove that all men are created equal."
"I don't have to! It's obvious!"
"We hold these truths to be self-evident..." comes from the US Declaration of Independence.
"We hold these truths to be self-evident: that all men are created equal."
The phrase "we hold these truths to be self-evident" means that the truths mentioned, which come after that famous phrase, do not need to be explained, defended, or rationalized. "Self-evident" means that the thing provides its own justification just because it exists.
The correct phrase is "We hold these truths to be self-evident,...." The primary author of the United States Declaration of Independence was Thomas Jefferson.
"These Truths" the Bill of Rights in the Declaration of Independence
Things that should be obvious, to a thinking person.
Self-Evident
preamble
preamble
you [should] assume the following is true
The Declaration of Independence.
Self evident means obviously true in itself, without need for justification. "We hold these truths to be self-evident, that all men are created equal..." The instinct for survival is self-evident, but instincts can be overridden by logic or emotion.