basic assumption
constatation
self-evident truth

This is the mere statement of a self-evident truth.

He said that mathematics was model for absolute self-evident truth.

Think about the explosive force of Jefferson's self-evident truth.

It gave us those "self-evident" truths at the heart of our whole way of life.

The existence of self-evident truths was one of those ideas.

The catch once more, though, is that the evidence does not support the self-evident truth.

From these self-evident truths, complex terms can be built up.

I believe that self-evident truths should not be dealt with by legislative means.

They also believe him when he declares "inequality of the races" as self-evident truth.

But if there's any self-evident truth about humans, it's that fear is the greatest motivator.