for sure

Idioms  

1. see for certain.

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Example Sentences

We must play the odds, but we can’t know for sure what will happen.

From The Wall Street Journal • Mar. 31, 2026

"We don't know for sure," he adds, "but there's a lot of kinetic things happening in that area at the moment".

From BBC • Mar. 30, 2026

"We have only seen a few tidal disruption events of this type, so we don't know for sure how they're supposed to evolve," Sears said.

From Science Daily • Mar. 30, 2026

The "short answer is we don't know for sure" what actually led to the reduction in size of Rosie's biggest tumour, said Pall Thordarson, director of UNSW's RNA institute which created the vaccine.

From Barron's • Mar. 30, 2026

She thought and thought yet could not say for sure whether there was such a picture.

From "The Very, Very Far North" by Dan Bar-el