Now that I think about it, this would also have the effect of removing any possibility of Jesus literally being from the line of David. If Joseph is not his bio-dad, and Mary is not his bio-mom, then how can he be said to have any claim to the throne of David?
There shall come forth a shoot from the stump of Jesse, and a branch shall grow out of his roots. (Isaiah 11:1)
Instead of a branch growing out of the roots, we have a whole brand new branch, attached, apparently, to nothing at all.
This begins to sound like a variety of Docetism.
Valentinus the Egyptian attempted to accommodate his system still more closely to Christian doctrine by admitting not merely the reality of the Saviour's body but even a seeming birth, saying that the Saviour's body passed through Mary as through a channel (hos dia solenos) though he took nothing from her, but had a body from above. (Catholic Encyclopedia, Docetism)
I guess the answer is that "whatever He was" He was adopted by Joseph. This begins to sound like a variety of Docetism.
There is nothing new under the sun.
SD
See what I posted about Melchisedec(sp) from Hebrews and his not having mother, father, beginning of days nor end of life.