"It is certain from various sources that this was to be an alternative base to Afghanistan."

I wasn't certain from the air, but it looked abandoned.

These days, she could not be certain from one moment to the next which way her emotions would leap.

Several told me that they were certain from the beginning of his innocence.

That, at least, was certain, from the issue in 1896.

I'm certain from the feeds it sent before our link broke.

Whatever the case, she was certain from the looks on their faces that they would never forget it.

Never being certain from one day to the next what the Law actually was, in this pragmatic city.

Susan wasn't certain from his expression whether Gavin was being serious or not.

But then you never could be certain of anything in this life, from the womb to the grave.