وَالدَّهْرِيَّةُ: أَنَّهُ لَا يَعْلَمُ ذَاتَهُ
The Dahriyya are reported to deny that God knows Himself.
A reasoning attributed to this position treats knowledge as a relation that must connect two distinct subjects. If knower and known are one, it says, no such relation obtains.
This turns a frequent feature of ordinary relational language into a universal definition of knowledge. Yet even human self-knowledge shows that knower and known need not be two independent beings.