Sentence examples for know with certainty from inspiring English sources

"We really don't know with certainty," Mr. Gelman said.

Wouldn't we be grateful if we could know with certainty?

How, and at what speed, we cannot know with certainty.

Researchers don't know with certainty what causes the disease.

Do you know with certainty that your formula will predict that end date accurately?

"We know with certainty that a debt crisis is coming to America.

Why Spanier felt Curley and Schultz were innocent: I don't know with certainty.

But, like those heartbroken students, I do not know with certainty what the future holds.

I will never know with certainty if that bomb would otherwise have killed me.

Still, it is impossible to know with certainty when credit card rates will be affected.

And I do know with certainty that we can defeat al-Qaida.