dead certainty

But he said with dead certainty that Iran would not agree to stop enriching uranium—no matter what incentives it is offered.

Its a dead certainty that hell meet the rest of the gang to talk things over before we leave the city.

Again the old woman nodded and beamed, this time with the dead certainty that he would find a blanket before long.

"I never bet on a dead certainty," answered the man whose turn it was to play.

I seemed to see in a flash exactly what had happened, and soon I shall know to a dead certainty.

If you have got my sister and Mr. Mallard to speak for you, it's all right—that's a dead certainty.