Adverb
fact is (not comparable)
(idiomatic) actually, in truth
The fact is that my native land is a prey to barbarism, that in it men's only God is their belly, that they live only for the present, and that the richer a man is the holier he is held to be. Jerome
A fact is a simple statement that everyone believes. It is innocent, unless found guilty. A hypothesis is a novel suggestion that no one wants to believe. It is guilty, until found effective. Edward Teller
However well equipped our language, it can never be forearmed against all possible cases that may arise and call for description: fact is richer than diction. J. L. Austin
Fact is stranger than fiction. Swedish Proverb
A single fact is worth a shipload of argument. American Proverb
A single fact is worth a shipload of argument. Albanian Proverb