Sentence examples for cannot say for sure from inspiring English sources

I cannot say for sure.

We cannot say for sure what happened.

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

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

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

As with anyone with PSP, Swankie cannot say for sure how long he has left.

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

Although archeologists cannot say for sure why these labor-intensive earthworks were built, others are far less circumspect.

They cannot say for sure that any particular species is a reservoir of diseases which could be transmitted to people.

It is a tribute to the richness of the film that one cannot say for sure who the hero is.

But given that it does occasionally rain and students do occasionally study, I cannot say for sure.