Ignorance and false claims of knowledge

وَمِنْهُمْ أُمِّيُّونَ لَا يَعْلَمُونَ ٱلْكِتَـٰبَ إِلَّآ أَمَانِىَّ وَإِنْ هُمْ إِلَّا يَظُنُّونَ

And among them are unlettered ones who do not know the Scripture except [indulgement in] wishful thinking, but they are only assuming.