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]

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Example Sentences

“You are eleven years old and should know better,” she scolded.

From Literature

If I didn’t know better, I’d say this was geometry class.

From Literature

They should not have done, because they have got enough experience throughout their team to know better - but what was most worrying is this is not the first time it has happened recently.

From BBC

“I don’t know. Better to have too many than too few.”

From Literature

"Because, if you know the facts only, it doesn't change people and doesn't change behaviour. We all know better, but we don't do better."

From BBC