And by the time they were completely certain the captain was dead, it would be too late.

For one thing, he could not be completely certain that either threat really existed.

And there is a small part of me that just can't make the final break until I am completely certain.

He was not completely certain of how he'd gotten here.

Her child, but she couldn't be completely certain of any single interaction.

Ginny herself was not completely certain how she felt from one moment to the next.

Nor was I completely certain why we had to confirm the pregnancy.

There was no way to be completely certain, and if he played his hand too soon it could blow all chances.

A reader can be completely certain which language they are reading if he or she comes across a tell-tale.

It took Reacher less than a minute to be completely certain of that.