According to Wikipedia: Sturgeon's Law is the name given to two different adages derived from quotes by science fiction author Theodore Sturgeon. The first is "Nothing is always absolutely so", while the second, and more famous, of these adages is: "Ninety percent of everything is crap." Sturgeon himself commented that Sturgeon's Law was originally "Nothing is always absolutely so"; the second adage was originally known as Sturgeon's Revelation. However, almost all modern uses of the term Sturgeon's Law actually refer to the second adage, including the definition currently listed in the Oxford English Dictionary.
Yeah, well, I like the original moniker. Sturgeon explains it this way: "I repeat Sturgeon's Revelation, which was wrung out of me after twenty years of wearying defense of science fiction against attacks of people who used the worst examples of the field for ammunition, and whose conclusion was that ninety percent of SF is crud."
