Sentence examples for know this for sure from inspiring English sources

No, we can't know this for sure.

Now, what some scholars may have speculated we don't know this for sure.

FRANKEN: I did not know this for sure—I didn't know it.

The police talked about him having murdered someone, hence the blackmail, but do we know this for sure?

Whether or not they explode next week, I know this for sure: for better or worse, the Scotland I love will have changed.

"We're confident that exercisers have lower heart risks than nonexercisers, but the truth is we don't know this for sure about marathoners".

Only God knows this for sure.

I might not have known this for sure but for my own wedding.

I knew this for sure after watching Mo Farah win the Olympic 10,000 metres last summer.

She knew this for sure, she insisted, because she was born in a Dragon Year, 1916, just as I was born in a Dragon Year 36 years later.

I knew this for sure: the unhealthiest thing I could do was keep thinking this way about my body.