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.

Given the lack of any count over time, it’s impossible to know for certain how agents’ current use of the banned and dangerous tactics compares with earlier periods.

From Salon • Jan. 14, 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

Rev Paul Fillery said it was likely caused by rain gradually eroding the soil and foundations, but the church would not know for certain until a survey was completed.

From BBC • Nov. 9, 2025

A lot of people are fine and they don’t have any complications, but I don’t know for certain what the outcome will be for me.

From MarketWatch • Oct. 9, 2025

“When I grow up, I’m going to find a way to know for certain who did a statue.”

From "From the Mixed-Up Files of Mrs. Basil E. Frankweiler" by E.L. Konigsburg