God would not impregnate a virgin. Steal Joseph bride for his use. So many problems. How if the HS came upon Mary, is the HS not the Father rather than the Father? The virgin story is a much later addition. The epistles never mentioned it. It was added later due to not real life but a reverse hindsight, interpretation of scriptures. The story of God's helping an underdog King to win..... so that he would know that it was by God's might, not his own, was..... not that a virgin... which is not able to be proved.... no one really knows who a virgin is... so why would that be a sign.... no the story has to do with time. In the OT days, wars were won by man power. Counting heads.. In time, the underdog kings man power would never increase to the point of being able to stand up to the opposition. Even if his man power increases, so does the opposition. He could never expect to win.... [parallel picture of battle against sin] but God said ask for a sign.... but he did not therefore God gave him a sign. In the amount of time.... from conception to weaning off, he would be victorious over his opposition. This would be a clear sign that he as a king, did not do this. Clearly in 3 or 4 years, he could not conquer his openet. But he did.... thus he knew "God is with us". It had nothing to do with virgin. Even CARM acknowledges that the word is maiden, not virgin. So this gives you a sense of dating of the writing of Matthew once you realize how it got written into Matthew as a wrong interpretation of the OT. More, if Jesus is not the son of Adam, then he could not be the coming Christ. OT lineage was never, son of a woman. it was always son of a man. Women were nothing notable in that day. All through the scriptures, we see son of Seth, son of Abram, son of... a man. Never a woman. No, Jesus was Adams biological son. Yet was the Son of God through adoption, the first born from the dead, firstborn of many brothers. Modern Christianity has not the slightest clue what's in the OT. They have no idea what the term "Son of God" means.