@DonC. Your friend’s question immediately brought to mind all the inferred or referenced designations we assign to others. There is no legalistic listing for these designations, but, they are never-the-less true and accurate.
Our mother’s names are not listed anywhere as Mrs. Mommy So & So. Or Ms. Mommy So & So. Our father’s nor our other relatives as well. Yet the titles are true and accurate. We assign those titles by virtue of the roles that are filled in our lives. Those are their names whether we can ever find a legal description or not.
Often because of anger or disappointment, we deny that an individual is our mom, or dad, or (fill-in-the-blank). Sometimes we believe this is true because we are unaware of the connection.
The Courts of the land can legally sever or terminate the association between us, but the biology remains.
It is unfortunate Mr. Borg believes he has identified who JESUS is by the failure to see a legalistic moniker. It is sad that a verse like John 10:30 doesn’t clarify the identity of JESUS.
I suspect that the real issue is a desire to sever the association that would make us debtors to this truth. Or, avoid an association that clearly justifies the need for homage, respect, love, and submission to the Lordship of JESUS.
But, the biology remains. Acknowledge it or not.
" In the beginning was the Word, and the Word was with God, and the Word was God.
The same was in the beginning with God.
All things were made by him; and without him was not any thing made that was made.
In him was life; and the life was the light of men.
And the light shineth in darkness; and the darkness comprehended it not." John 1:1-5.