Sentence examples for not know for sure from inspiring English sources

How could they not know for sure?

Woodson does not know for sure.

We did not know for sure.

But he could not know for sure.

But Lombardi says that he does not know for sure.

We do not know for sure how these fights will end.

Hence, he could not know for sure that he had been in the Arctic Ocean.

Mr. Goldenberg does not know for sure that his work was stolen.

Vajda does not know for sure what to expect from his pupil, from Gencic's pupil.

He did not know for sure, but he figured his clients were gone.

He just did not know for sure until the race was run.