The copyright notice found in Principia Discordia (and also in influenced material). Effectively, this means "public domain".
In full form: (K) All rights reversed - Reprint what you like.
Principia Discordia was published under this very "broken copyright" because, according to the author, about 60% of it (most of the pictures) was copied from elsewhere - and, of course, because Eris wanted to; Hail Eris.