In the psychology of human behavior, denialism is a person's choice to deny reality as a way to avoid believing in a psychologically uncomfortable truth. Denialism is an essentially irrational action that withholds the validation of a historical experience or event when a person refuses to accept an empirically verifiable reality.
Banner at 2017 Climate March in Washington D.C.
"COVID is a lie" graffiti in Pontefract, West Yorkshire, England
The Iğdır Genocide Memorial and Museum promotes the view that Armenians committed genocide against Turks, rather than vice versa.
Denial, in ordinary English usage, has at least three meanings: asserting that any particular statement or allegation is not true ; the refusal of a request; and asserting that a true statement is not true.
A 17th century painting depicting the Denial of Peter, a story told in the four Gospels in the New Testament. In it, Peter denies having associated with Jesus, who is being sought by authorities.