A defense mechanism involving a refusal to accept the truth of a phenomenon or prospect.
A disownment or disavowal
An assertion of untruth.
Refusal to believe that a problem exists.
Refusal to admit responsibility for wrongdoing.
A refusal or failure to provide or grant something that is requested or desired.
Negationism, denialism of historical facts or accepted interpretation.
The negation in logic.
The practice of rejecting propositions which are strongly supported by scientific or historical evidence, and often of seeking to influence policy processes and outcomes accordingly.