Sentence examples for cannot say for from inspiring English sources

I cannot say for sure.

I cannot say for certain.

But you cannot say for certain.

We cannot say for sure what happened.

Even one of her closest friends cannot say for sure where she is buried.

"I honestly cannot say for how long we are gone," she wrote.

As for the details, he added, "I cannot say for sure".

They still cannot say for certain that the three are interstellar particles.

We cannot say for sure they were clean, but most writers seem to assume they were.

I cannot say for certain, as I have yet to taste it.

I would say I believe there are, but I cannot say for sure".