hard fact

That's not their fault; it's just the hard fact of human nature.

But Whitman and Fiorina also ran up against a hard fact of California life.

Even in the otherwise excellent film The Great Debaters, the protagonist cites the "letter" as a hard fact.

But Mazzini never faced the hard fact, that no otherwise could Austria be driven out.

This fact of inference is as much a datum—a hard fact—for logical theory as any sensory quality whatsoever.

But I was going to need more 'good stuff'; that was the first hard fact to be faced.

The cold hard fact was that not one of his guns spoke its piece.

Probably the seeming impossibility is a hard fact, disclosed by some forgotten trial or recorded in some old newspaper.