cast doubt

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cast doubt

To cause someone or something to be viewed with doubt, skepticism, or uncertainty. Why did you change your mind about giving Walt the promotion? Did something happen to cast doubt?
See also: cast, doubt

cast doubt on (someone or something)

To cause someone or something to be viewed with doubt, skepticism, or uncertainty. I considered Walt for the promotion, but his constant lateness soon cast doubt on that decision. Such a significant error really cast doubt on all of the experiment's results.
See also: cast, doubt, on
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

cast doubt(s) (on someone or something)

to cause someone or something to be doubted. The police cast doubt on my story. How can they cast doubt? They haven't looked into it yet. The city council cast doubt on John and his plan.
See also: cast, doubt
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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References in classic literature ?
That alone disqualifies you; it casts doubts on your impartiality.
But police find evidence that casts doubts on her version of events.
Chief executive Richard Scudamore's submission to Lord Terence Burns' inquiry, which is currently conducting a review of the FA, casts doubts on the two bodies' future together.
But a newly released report casts doubts on those claims.
For instance, while unequivocally recognizing Lorenzo Valla's accomplishments, Wilson also makes clear Valla's weaknesses as a Greek scholar and casts doubts on some of his supposed achievements.
Commenting on the affair, New Republic editor Michael Kelly asserted that it casts doubts on the viability of charter schools.