Sturgeon's law

The cover of the September 1957 issue of Venture Science Fiction, in which Sturgeon first published "90% of everything is crud."

Sturgeon's law (or Sturgeon's revelation) is an adage stating "ninety percent of everything is crap". It was coined by Theodore Sturgeon, an American science fiction author and critic, and was inspired by his observation that, while science fiction was often derided for its low quality by critics, most work in other fields was low-quality too, and so science fiction was no different.[1]

  1. ^ Charles Clay Doyle; Fred R. Shapiro; Wolfgang Mieder, eds. (2012), The Dictionary of Modern Proverbs, Yale University Press, pp. 76–77, ISBN 9780300183351