An important contrast is that Oulipo's constraints sought to boost a book's or story's quality, not quantity, mainly by forcing authors to pick words unusually

An important contrast is that Oulipo's constraints sought to boost a book's or story's quality, not quantity, mainly by forcing authors to pick words unusually scrupulously. An illustration of such a constraint would consist of radically omitting that most popular symbol in our vocabulary. An important Oulipo alumnus got to author a book wholly in that way. (Look it up: A Void.)