The document discusses whether the Islamic concept of abrogation implies that God made a mistake in the Quran. It provides 4 examples to argue that abrogation does not mean contradiction: 1) Challenges to produce a book/surahs like the Quran became progressively easier, without contradicting earlier challenges. 2) Gradual prohibition of intoxicants occurred over 3 stages without contradiction. 3) Abrogated verses are still true and followed by obeying the latest revelation. 4) For there to be contradiction, verses must not be possible to follow simultaneously, but all Quranic verses can be followed together. Therefore abrogation does not imply contradiction or mistake by God.