Sturgeon's Law
"Ninety percent of everything is crap".
Derived from a quote by science fiction author Theodore Sturgeon, who once said, "Sure, 90% of science fiction is crud.
That's because 90% of everything is crud."
Oddly, when Sturgeon's Law is cited, the final word is almost invariably changed to "crap".
Compare
Ninety-Ninety Rule.
Though this maxim originated in SF fandom, most hackers recognise it and are all too aware of its truth.
[
Jargon File]
