To accept even tangible evidence, one needs to be prepared to change their opinion at all. Very often the opinion, and the worldview it buttresses, is too impor

To accept even tangible evidence, one needs to be prepared to change their opinion at all. Very often the opinion, and the worldview it buttresses, is too important for the comfort and confidence in the world to allow any evidence ruin it. Counterexamples would be rejected as rare deviations or observational errors. Systemic evidence would be written off as propaganda and gaslighting. Persuasion by close friends may even be seen as perfidy and an attempt to maliciously pull a leg. Sadly, the most correct model of the world is not necessarily a prerequisite for the best fitness and thus survival.