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know better

Idioms  
  1. Be able to recognize something as wrong or not possible, as in Mary should know better than to leave her child alone in the house, or Try to get in without a ticket? You know better than that. [c. 1700]


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.

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Said Harbaugh: “Have to get things to get better, for sure. You know, better job coaching, better job practicing, better job executing. All those things need to be elevated.”

From Los Angeles Times ● Sep. 14, 2026

I don’t want to check, but I’m sure everyone’s favorite betting apps will offer odds on this event, though even Polymarket and Kalshi may know better than to piss off the president.

From Salon ● Aug. 28, 2026

No one rings a bell at the top, and seasoned traders know better than to try to pick the exact peak.

From Barron's ● Jun. 11, 2026

He criticised "pearl clutching and hypocrisy from people who should know better".

From BBC ● Jun. 8, 2026

“Edda, if I didn’t know better, I’d almost wager that you didn’t expect your mother and me to be home.”

From "The Brightwood Code" by Monica Hesse

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