Conspiracy theorist

A conspiracy theorist is one who believes in an explanatory or speculative hypothesis suggesting that two or more persons, or an organization, have conspired to cause or cover up, through secret planning and deliberate action, an event or situation typically regarded as illegal or harmful. The term conspiracy theory has derogatory connotations, suggesting explanations that invoke conspiracies without warrant, often producing hypotheses that contradict the prevailing understanding of historical events or simple facts.