know for certain

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Since shadow docket rulings are unsigned, we can’t know for certain the usual tally of supporting and opposing justices.

From Salon • Apr. 22, 2026

If we don’t know for certain whether brain training can lower the risk of dementia, but it might just, then why wouldn’t we do it?

From MarketWatch • Feb. 11, 2026

Vonn said she skied in Cortina on Tuesday and that her knee felt good with no pain but that she will not know for certain how she feels until she skis the downhill course.

From BBC • Feb. 3, 2026

We can’t know for certain if the Values Bridge data reveals a slow trend away from the centrality of family in the American psyche or a sudden drop, or why in either case.

From The Wall Street Journal • Nov. 20, 2025

"Yes. I don't know her name or where she is now. But I know for certain who she was."

From "Son" by Lois Lowry