Because we know for a fact certain that arms have gone in there.

Certain facts about his private life were not yet clear.

It wasn't a question, but a statement of certain fact.

I'm going to write down a list of the certain facts?

However certain the fact of death, the event itself always came as a shock.

He frequently kept certain facts to himself and with good reason.

Mother began to hold back certain facts from them after that event.

There are certain facts which I think perhaps you and your wife ought to know.

"You are still quite young and most certainly naive about certain facts."

But there, I promised not to tell that part, at least until the young people themselves were ready to have a certain fact announced.