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

But the plaintiffs had doctors testify that they could not know for certain whether an infant with these defects would live for days, weeks, or maybe even a few months before suffering a painful death.

From Slate • Jan. 10, 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

“All we know for certain is that the treasure is hidden in a cavernous room underneath this school.”

From "The Smartest Kid in the Universe" by Chris Grabenstein