Far from being magisterial in its objectivity, science was conditioned by history, society, and the prejudices of scientists.
Thomas Kuhn"Normal science" means research firmly based upon one or more past scientific achievements, achievements that some particular scientific community acknowledges for a time as supplying the foundation for its further practice.
Thomas KuhnIndividuals who break through by inventing a new paradigm are almost always either very young men or very new to the field whose paradigm they change. These are the men who, being little committed by prior practice to the traditional rules of normal science, are particularly likely to see that those rules no longer define a playable game and conceive another set that can replace them.
Thomas KuhnIn science novelty emerges only with difficulty, manifested by resistance, against a background provided by expectation.
Thomas Kuhn