Luther was making a polemical point about the canonicity of these books. While Wisdom of Sirach and the Wisdom of Solomon were books of disputed canonicity. As with all spin-off media, its canonicity in relation to the television series is debatable. "Silent Hill 2" features six endings; Konami has kept their canonicity ambiguous. Akiva stoutly defended, however, the canonicity of the Song of Songs, and Esther. Its canonicity was later contradicted by events in "Saw IV". Again this list asserts the canonicity of Jeremiah without reference to Baruch. The canonicity of the novels is unclear. The canonicity of other stories in the series is undetermined. An important concept to spoken and written Klingon is canonicity. This reflects the thoughts of the Reformer Martin Luther on the canonicity of these books. Gene Roddenberry was something of a revisionist when it came to canonicity. Other traditions maintained different customs regarding canonicity. As this was a Vertigo series, DC Universe canonicity is unclear. The canonicity of the match ever since.