I do not believe Mary was sinless, or divine in her own right in any way. I believe Mary was simply a young girl, like any other young girl, who got pregnant (by someone very human) and had to be married off to avoid embarrassment to her family: enter Joseph, Mary's senior by multiple decades, being chosen to marry her. Joseph, upon finding out Mary is already pregnant, plans to ditch her in some backwater town but is convinced otherwise. In time, Jesus is born- perfectly normally- and grows up normally like any other very human baby boy.
HOWEVER, the spirit within Jesus- placed in him at conception- is a particularly strong one, being the Christ. Jesus is not the Christ himself, but the Christ is within him. But that's a different story.
Goodman John,
The only problem I have with your reasoning is: it goes completely against the Bible, and any person who hopes to live very much longer must believe God Word, The Holy Bible. God even promised that He would protect His words from all generations, Psalms 12:6,7. Notice that the Bible, even Jesus said; Your word is truth, John 17:17. In at least two places the Bible tells us that God’s word remains forever, Isaiah 40:8, 1Peter 1:25, and also this word that has been proclaimed to you. So if a person disregards God’s Words, it is impossible to Help a person to everlasting life, 1Timothy 4:16, Psalms 10:4.
Something to remember; different men have tried to show where God’s word is inaccurate, for many years. Even though the Bible was written over a period of 1600 years, being completed about 2,000 years ago, it is still the most up to date book on earth. When men write books there books are outdated by the time they are put on the book shelves. It is usually easy to find something wrong with any book written today, because knowledge is doubling every few years. Think about that, God’s word is still the most up to date book on earth, even more than up to date, it Prophesies about the future. Think about what Jesus says at Luke 10:21. What Jesus said is beyond the possibility of men!! No man is wise enough to write a book that babes can understand, but wise men cannot, but God did.
To understand God’s word you must be humble and open to knowledge, Matthew 18:1-4. A person must pray for The Holy Spirit, along with sincerity, to understand the deep things of God, 1Corinthians 2:1-16.
One more point; we are all limited by our lack of knowledge, called Egocentric Predicament, or Epistemological Predicament, meaning we, compared with God, know NOTHING, so how can we question or reason something different than what is written in the Book written by the only Omniscient person in existence. It is really the unreasonable for any person to disagree with what God said, Job 36:4, Job 37:5,16,40:8, 42:1-3. Consider what is said at Isaiah 55:8,9, also 1Corinthians 3:18,19.
Think about this; according to Science mankind uses about 3% of our brain power. God made man to use 100%, think about how much smarter we will be when we live in the Paradise earth that God promises. God knows everything, should we question Him, or try to learn what we can, from Him.
Another point, think about what is said at 1Corinthians 8:2, you think you know something, you do not know it just as you ought to know it. God knows everything, He Created Everything, Acts 17:24,25. Agape!!!