The doctrine, based on Qur'an 2:106, Qur'an 13:39, Qur'an 16:101, Qur'an 17:86, Qur'an 87:6-7, that Allah rescinded some previous revelations. The most crucial topic for any infidel is the rule of abrogations through which Allah allowed Himself to change His mind. Apart from this silliness stands the fact that most of the peaceful verses (written in Mecca) likely quoted by Islamic apologists, were, in fact, substituted by others (later written in Medina): mainly all the bloody verses found in chapters 3 (-Chr.89-), 5 (-Chr.112-), 8 (-Chr.88-) and chapter 9 (-Chr.113-), particularly its 'Verse of the Sword' (9.5).