There can be no certain answer in law to these problems.

"We could test him to the death and not find a certain answer."

Unfortunately, your questions are the ones I have no certain answers to.

It seems that you consider certain answers to be more important than your life.

He'd have known, too, he was raising questions to which even the doctors had no certain answers.

The decisions of the Florida courts do not give a certain answer.

She felt certain the answer had to be here, somewhere, but in which one?

It's obvious that there are no certain answers to these questions.

So far there seemed no certain answer to that question.

Eventually he said, "What makes you so certain the answer's in past records?"