ABSTRACT
Prejudices are at the heart of the opposition between Bayesians and frequentists. Prejudices are the main reason why in the last two centuries Bayes’ rule has been rejected. Scientists wanted their work to be objective. Yet, prejudices seemed necessarily subjective. As a result, frequentists and most scientists regarded the subjectivity of prejudices as the fatal deficiency of Bayesianism. Prejudices also have very useful consequences on the way scientists deal with empirical anomalies. For instance, when the OPERA experiment thought that they had detected faster-than-light neutrinos, their announcement was accompanied with general skepticism. In Nature, natural selection then favours some genetically modified organisms over others. In agriculture, a similar, but artificial, selection occurs. For thousands of years, domesticated species, both vegetal and animal, have been undergoing this artificial selection of genetically modified organisms.
