Thesis: The Quran shows that Muhammad is a false prophet.
In Muhammad’s revelation (The Quran) it is mentioned that if Muhammad was a false prophet, God would have killed him by cutting his aorta:
> The Reality (69:44-46) > > 69:44 > وَلَوْ تَقَوَّلَ عَلَيْنَا بَعْضَ ٱلْأَقَاوِيلِ ٤٤ > > And if Muhammad had made up about Us some [false] sayings, > > 69:45 > لَأَخَذْنَا مِنْهُ بِٱلْيَمِينِ ٤٥ > > We would have seized him by the right hand; > > 69:46 > ثُمَّ لَقَطَعْنَا مِنْهُ ٱلْوَتِينَ ٤٦ > Then We would have cut from him the aorta > — Sahih International
And guess what this is exactly what happened:
> وَقَالَ يُونُسُ عَنِ الزُّهْرِيِّ، قَالَ عُرْوَةُ قَالَتْ عَائِشَةُ ـ رضى الله عنها ـ كَانَ النَّبِيُّ صلى الله عليه وسلم يَقُولُ فِي مَرَضِهِ الَّذِي مَاتَ فِيهِ " يَا عَائِشَةُ مَا أَزَالُ أَجِدُ أَلَمَ الطَّعَامِ الَّذِي أَكَلْتُ بِخَيْبَرَ، فَهَذَا أَوَانُ وَجَدْتُ انْقِطَاعَ أَبْهَرِي مِنْ ذَلِكَ السَّمِّ ".
> Narrated Aisha: The Prophet (ﷺ) in his ailment in which he died, used to say, "O Aisha! I still feel the pain caused by the food I ate at Khaibar, and at this time, **I feel as if my aorta is being cut from that poison.**" > Sahih al-Bukhari 4428
> https://sunnah.com/bukhari:4428
God definitely has a sense of humor ;).
Therefore there are only 2 possibilities:
The Author of the Quran did not forsee Muhammad's statement on his dying bed, which made it obvious he was a false prophet. Therefore the author of the Quran would not be all-knowing, which would make Muhammad a false prophet for claiming the Quran is the verbatim word of God.
The Author of the Quran forsaw Muhammad's statement but still put the verse in the Quran to show Muslims that Muhammad is a false prophet. This would make the Author of the Quran someone who contradicts himself which would make the Quran false and Muhammad a false prophet.