English-French translations for conspiracy theory

théorie du complotÀ ce titre, je souhaite vous faire part d'une théorie du complot qui circule et qui m'a été racontée hier par un entrepreneur biélorusse. In this respect, I would like to tell you about a conspiracy theory that is circulating, told to me yesterday by a Belarusian businessman.

A hypothesis alleging that the members of a coordinated group are, and/or were, secretly working together to commit illegal or wrongful actions including attempting to hide the existence of the group and its activities. In notable cases the hypothesis contradicts the mainstream explanation for historical or current events.
Hypothetical speculation that is commonly considered untrue or outlandish

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