Thank you, Clarence Crawford. All of human life is a process of dealing with errors ... errors of perception, of thinking, of knowledge, of actions, and many more. It is far too easy for people to assume that they have "the truth" when, more likely, they are operating on various degrees self-delusions. Science is a process to gradually shave away some of the errors and slowly approach a better statistical approximation of "what reality really is". Even with science, there is always some information missing ... and thus the search continues. With more and more evidence, there hopefully comes to be more reliable and valid concurrence of "knowledge".

A first step is to realize/admit that the self-delusion exists - and then  monitor your inner-thinking to counteract the compounding of errors. This takes active work. It is far easier to continue in the mental ruts of past errors (stereotypes, ideologies, social pressures). Critical thinking is needed - in education - and for politicians.