plant a/the seed of doubt (in someone's mind)

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plant a/the seed of doubt (in someone's mind)

To cause someone to have doubts, worries, or concerns (about something); to introduce someone to a doubtful or worrisome idea. The candidate was doing very well in the polls six months ago, but it seems that this smear campaign has been effective in planting a seed of doubt in the minds of voters. Recent economic turbulence in the Eurozone has planted the seed of doubt about the strength of the economy's recovery. Every time you act suspiciously like that, it plants a seed of doubt in my mind about your fidelity.
See also: doubt, of, plant, seed
References in periodicals archive ?
He didn't get the proof he wanted about Charity's faked miscarriage, but he has managed to plant the seed of doubt in Declan's mind.
He didn't get the proof he wanted about Charity's faked miscarriage but he has managed to plant the seed of doubt in Declan's mind.
After opening the match with two well-worked points, Alayli faltered to allow Thangarajah a chance to break, and the Sri Lankan dispatched the chance to plant the seed of doubt in Alayli's head.
This case could plant the seed of doubt into the minds of thousands of parents whose children go to the library for schoolwork or simply to find a good book.