Closed concept  

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"What I am arguing, then, is that the very expansive, adventurous character of art, its ever-present changes and novel creations, makes it logically impossible to ensure any set of defining properties. We can, of course, choose to close the concept. But to do this with "art" or "tragedy" or "portraiture," etc., is ludicrous since it forecloses on the very conditions of creativity in the arts." --"The Role of Theory in Aesthetics" (1956) by Morris Weitz

"Despite anticipations in Nietzsche, the idea of an open concept—often also referred to as an open-textured concept—was first explicitly used by Friedrich Waismann in his essay on the verifiability of empirical statements. Waismann's account is reminiscent of Wittgenstein's remarks on unbounded concepts and family resemblances, and is well, if not exhaustively, understood in the light of these. Concepts of democracy, justice, and art, as well as of music and musical work, are examples to keep in mind as we proceed with the more general discussion."--The Imaginary Museum of Musical Works (1992) by Lydia Goehr

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A closed concept is a concept where all the necessary and sufficient conditions required to include something within the concept can be listed. For example, the concept of a triangle is closed because a three-sided polygon, and only a three-sided polygon, is a triangle. All the conditions required to call something a triangle can be, and are, listed.

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Unless indicated otherwise, the text in this article is either based on Wikipedia article "Closed concept" or another language Wikipedia page thereof used under the terms of the GNU Free Documentation License; or on research by Jahsonic and friends. See Art and Popular Culture's copyright notice.

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