belief perseverance
cognitive inertia – Tendency for a particular orientation in how an individual thinks about an issue, belief or strategy to endure or resist change
Confirmation bias – Tendency of people to favor information that confirms their beliefs or values
denialism – Person's choice to deny reality, as a way to avoid a psychologically uncomfortable truth
Idée fixe – Idea that preoccupies an individual and that he is unwilling to give up despite evidence to the contrary