Negationism, denialism of historical facts or accepted interpretation.
A disownment or disavowal
An assertion of untruth.
Refusal to believe that a problem exists.
A defense mechanism involving a refusal to accept the truth of a phenomenon or prospect.
Refusal to admit responsibility for wrongdoing.
A refusal or failure to provide or grant something that is requested or desired.
The negation in logic.
Any of a range of concepts regarding spirituality and religion which do not include the idea of a deity in the form of a theistic god or gods.