Allah Knows That Which Will Not Happen

Allah knows that which happened in the past, Allah knows the present and the future. So say for example, and this is manifest in Surah Tulkahaf where Allah almighty speaks about Musa al-Hizalamu al-Hidr. The child was never going to live in the knowledge of Allah, Allah knew the child is going to die at this age but Allah also knew if this child had been given life which it was neverGoing to be given.