Découvrir quelque chose de façon sûre.
To find out something for certain.
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See how the word “établir avec certitude” is used in sentences
La police a cherché à établir la cause avec certitude. — Police tried to ascertain the cause.
Nous devons établir avec certitude si le fichier a été envoyé. — We need to ascertain whether the file was sent.
Comment ont-ils établi l'heure exacte ? — How did they ascertain the exact time?
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