﴿ وَمِنْهُمْ أُمِّيُّونَ لَا يَعْلَمُونَ ٱلْكِتَٰبَ إِلَّآ أَمَانِىَّ وَإِنْ هُمْ إِلَّا يَظُنُّونَ ﴾

“And there are among them unlettered people who have no real knowledge of the divine writ, [following] only wishful beliefs and depending on nothing but conjecture.”

Please check ayah 2:79 for complete tafsir.