How not to create a classification system

Does social science require systems of classification? From Jorge Luis Borges' description of a fictional Chinese classification of animals: “These ambiguities, redundancies and deficiencies remind us of those which doctor Franz Kuhn attributes to a certain Chinese encyclopaedia entitled 'Celestial Empire of benevolent Knowledge'. In its remote pages it is written that the animals are …

Generalizations about cluster items

What is the basis of classification of items into groups? And how do classifications fit into scientific inquiry and theory? First, what different types of classification are there? Essential: The items may share a common defining characteristic (e.g. "liquid", "metal")-- Etiological: The items may share a common cause (e.g. "viral illness")-- Structural: The items may …