Paradigm
Paradigm paralysis

Perhaps the greatest barrier to a paradigm shift, in some cases, is the reality of paradigm paralysis: the inability or refusal to see beyond the current models of thinking. This is similar to what psychologists term confirmation bias and the Semmelweis reflex. Examples include rejection of Aristarchus of Samos', Copernicus ', and Galileo 's theory of a heliocentric solar system, the discovery of electrostatic photography, xerography and the quartz clock.
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