The Quran is free from contradictions, and Muhammad only spoke by divine revelation.

The Quran asserts that if it were from anyone other than Allah, contradictions would be evident (Quran 4:82). However, many scholars and critics point out various contradictions within the Quran itself, as well as discrepancies in the hadiths that record Muhammad's teachings. For example, the teachings regarding the nature of prayer and invocation show significant variation among different Islamic traditions, indicating that Muhammad's messages may not be as clear-cut or divinely inspired as claimed. Furthermore, the hadiths, which are supposed to provide authoritative accounts of Muhammad's sayings and actions, also contain contradictions and are subject to varying interpretations. This leads to significant theological divisions within Islam, suggesting that the claim of divine revelation is not as straightforward as presented. If Muhammad's teachings were purely inspired, one would expect a unified understanding among his followers, which is clearly not the case. In light of these points, the assertion that the Quran is free from contradictions and that Muhammad spoke only by divine inspiration is called into question. The existence of differing interpretations and the presence of contradictions within Islamic texts suggest a more complex reality that challenges the foundational claims of Islam.