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A '''conspiracy theory''' is a belief, held by a significant segment of society, that is sometimes at odds with accepted wisdom, evidence, and logic. For the bulk of society not to accept such a belief requires that society may be be engaged in some kind of conspiracy to cover up the truth or are victims of [[mass formation psychosis]].
Conspiracy theories often involve a plot by multiple individuals to cause a major event having political consequences, as in the conspiracy theory invented by [[Hillary Clinton]] and other [[liberals]] that [[Russia]] interfered with the presidential election in the [[United States]] in 2016, leading to [[Donald Trump]]'s victory.