"Complete denial" refers to a situation where someone refuses to accept or believe something, even when there is clear evidence or facts contradicting their belief. It means completely rejecting the truth or reality of a situation. Full definition
If you continue to hold onto this theory you will be in complete denial of reality. (globalclimatescam.com)
He is in complete denial over the DM issue. (justarsenal.com)
The country is, however, in almost complete denial on the subject of global warming — not only whether something should be done, but whether humans are involved at all. (realclimate.org)