ACIM uses the term "sons" referring to God's many directly-created REAL sons, 82 times. Here are some of the quotes which are so blatant in their statement that God has created MORE THAN ONE SON.
"*PERCEIVE him correctly, so that your Soul can KNOW him. Right perception is necessary before God can communicate DIRECTLY to his own altars, which he has established in His Sons."
"*It is the final lesson that I learned, and God's Sons are as equal as learners as they are as Souls."
"*The world can ADD nothing to the power and the glory of God and His Holy Sons, but it can blind the Sons to the Father if they behold it. You cannot behold the world and know God. Only one is true."
"*Holy indeed are we, because our Source can know no sin. And we who are His Sons are like each other, and alike to Him."
"*God created His Sons by extending His Thought and retaining the extensions of His Thought in His Mind. ALL His Thoughts are thus perfectly united within themselves and with each other because they, were created neither partially nor in part."
"*All the Sons of God are waiting for your return, just as YOU are waiting for THEIRS."
"*Could you hear His answer except as He answers all of God's Sons?"
"*We are creation; we the Sons of God."
"*Only one equal gift CAN be offered to the equal Sons of God, and that is FULL APPRECIATION."
"*Your creations cannot establish your reality, any more than YOU can establish God's. But you can know both. Being is known by sharing. Because God shared His Being with you, you can know Him. But you must also know all He created to know what they have shared. Without your Father you will not know your fatherhood. The Kingdom of God includes all His Sons and their children, who are like the Sons as they are like the Father. Know then the Sons of God, and you will know all Creation."
"*You cannot enter into REAL relationships with ANY of God's Sons, unless you love them all, and EQUALLY."
"*God is not a stranger to His Own Sons, and His Sons are not strangers to each other."
"*Because God's equal Sons have everything, they CANNOT compete."
"*The Kingdom of God includes all His Sons."
"*When the Atonement is complete and the whole Sonship is healed…the Holy Spirit will remain with the Sons of God, to bless their creations and keep them in the light of joy."
"* If all His creations are His Sons, every one must be an integral part of the whole Sonship."
"*If you believe that all of the Souls that God created are His Sons, and if you also believe that the Sonship is One, then every Soul must be a Son of God, or an integral part of the Sonship."
"*The voice of the Holy Spirit IS the call to Atonement, or the restoration of the integrity of the mind. When the Atonement is complete and the whole Sonship is healed, there will be no call to return, but what God creates is eternal. The Holy Spirit will remain with the Sons of God, to bless THEIR creations and keep them in the light of joy."