We often use the word “concept” when we want a more exact equivalent for the word “idea.” Here are some examples of concepts: human being, cat, house, table, chair, computer, tree, painting, book, square, soft, red, unicorn, art, design, object, image, text, atom, universe, capitalism, racism, beauty, truth, sameness, and whole. As we can see from this list, concepts come in all shapes and sizes. They can be general or specific, concrete or abstract, natural or technological, artistic or scientific.

Concepts are the basic building blocks in human thinking; as such, they are highly flexible. They can apply to things that are real (e.g., people and cats) or imaginary (e.g., unicorns and fairies). They can ...

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