A taxonomy is a classification of things according to their natural relationships. Taxonomies are essential to the development of a science because without classification of data science could not grow. Mere classification, however, does not constitute a theory. However, taxonomies can evolve into theories when they begin to generate testable hypotheses and to explain research findings. For example, Robert McCrae and Paul Costa began their research by classifying people into five stable personality traits. Eventually, this research on the Big Five taxonomy led to more than a mere classification; it became a theory, capable of suggesting hypotheses and offering explanations for research results.
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