A concept is a mental category for classifying or grouping objects, people, and experiences based on their common features. Using concepts, we can organize our perceptions of the world and categorize new experiences. Through concept hierarchy, we organize information in a particular way, with some concepts being general and others specific.
A category is a concept that organizes other concepts around what they share in common. We use prototypes, mental models of the most typical examples of a category, to classify new objects.
An example of classifying an unknown object according to category, based on its similarity to the prototype (or archtype) we have in mind.
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