Knox's Decalogue(ノックス十戒Nokkusu Jikkai) is alluded to several times in the episodes leading up to End of the Golden Witch. Then, in that episode it is actually used by Dlanor A. Knox and her assistants. The Decalogue was originally written in 1929 by Ronald Knox, in an attempt to codify the rules of the golden age of detective fiction. In the Umineko no Naku Koro ni series it has been suggested that the Decalogue may be a useful tool in attempting to solve the murder mysteries presented, though it is not necessarily iron clad, and the exact interpretation of each rule is left to the reader.