self deception

 Minimally, self-deception involves a person who (a)  as a consequence of some motivation or emotion, seems to acquire and maintain some false belief despite evidence to the contrary

by example, as some people argue,  Joe Biden claiming that his son  Hunter is the most intelligent person... and he, Joe Biden is an  honest politician etc

Self-deception isn’t merely a philosophically interesting puzzle but a problem of existential concern. It raises the distinct possibility that we live with distorted views that may make us strangers to ourselves and blind to the nature of our morally significant engagements

SELF PARTITIONING

Another strategy employed is the division of the self into psychological parts that play the role of the deceiver and deceived, respectively. These strategies range from positing strong division in the self, where the deceiving part is a relatively autonomous subagency capable of belief, desire, and intention