At the start a new candidate for paradigm may have few supporters…. Nevertheless, if they are competent, they will improve it, explore its possibilities, and show what it would be like to belong to the community guided by it. And as that goes on, if the paradigm is one destined to win its fight, the number and strength of the persuasive arguments in its favor will increase…Gradually the number of experiments, instruments, articles and books based on the paradigm will multiply. Still more men, convinced of the new view’s fruitfulness, will adopt the new mode of practicing normal science, until at last only a few elderly hold-outs remain.