Delusions
A delusion is an unshakable belief in something untrue. These irrational beliefs defy normal reasoning and remain firm even when overwhelming proof is presented to dispute them. Delusions are often accompanied by hallucinations and/or feelings of paranoia, which act to strengthen confidence in the delusion.
One cannot argue or convince someone experiencing a delusion that their perceptions are not accurate. One effective strategy is to acknowledge to the person that what they are experiencing must be extremely stressful. This opens the door for a recommendation to seek treatment and a medication evaluation for stress and anxiety rather than for a “psychotic” disorder. This engenders trust and does not create a confrontation.