This is based on fact.
That fact can't be denied.
I can't hide the fact from you.
We can't deny the fact that he's honest.
I love the fact that you always seem to care so much.
She concealed the fact that she used to be a salesgirl.
She isn't kind to him. In fact, she's not kind to anyone.
Tom is not a lazy boy. As a matter of fact, he works hard.