Answer: The confirmation bias
Explanation: This type of bias is, in fact, a persistent affirmation of one's own views, whereby only those cases, information or events that confirm those views are emphasised. Any information that in any way confirms an opinion will be used as evidence for a particular opinion, view. On the other hand, the existence of information that suggests opposite is dismissed, and then usually someone like Douglas remembers the information that continues to support his claim or opinion, overriding the information of the opposite claim, which proves opposite. Such a persistent person, although there is evidence to the contrary, means persistently holding on to a false belief and basing their arguments on the weight of the evidence, that is, the amount and not on the validity of that evidence.