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Most artists today produce "series" - their commodification of a single artistic thought. For many art itself has become a form for inventing processes to serialize, commodify, i.e. "the production method is the product." Developing a "viewpoint", "signature" or "conceptual framework" - pick your ballyhoo'd sales tactic. A historic development likely due to the demands of both filling an exhibition schedule, and the fact that "the exhibition" had superseded the object as art's measurable unit of thought. Perhaps one stemming from the other. Bettina was an artist who, without any exhibition schedule or inventory space at all, mass invented means for artistic mass production, and then followed through on that production beyond the point of rational good thought - eventually filling her apartment so full she slept in the hallway on a lawn chair (or so the myth goes.) It's like an artistic Sorcerer's Apprentice, one conceptual Library of Babel spell is invented and the things begin to spawn, producing and reproducing until you live outside in a different world, unable to invent the spell to shut the brooms off.