"Sturgeon deemed Sturgeon's law to mean "nothing is always absolutely so" in the story "The Claustrophile" in a 1956 issue of Galaxy.[1] The second adage, variously rendered as "ninety percent of everything is crud" or "ninety percent of everything is crap", was known as "Sturgeon's Revelation", formulated as such in his book review column for Venture[2] in 1957. However, almost all modern uses of the term Sturgeon's law refer to the second,[citation needed] including the definition listed in the Oxford English Dictionary.[3]"

https://en.wikipedia.org/wiki/Sturgeon%27s_law

https://en.wikipedia.org/wiki/Theodore_Sturgeon