Interesting position brother. Something that I would point out is that the commandment given to man to be fruitful, came prior to the fall. It appears that it was always God's plan for Adam and Eve to produce a godly seed. The Fall was a "interruption" in God's original plan. The plan of redemption is designed to get us back on track with the original plan. As for Adam not knowing his wife after the fall, the scripture, that could be true. However, scripture does not state that he first knew his wife after the fall. The passage is to give us insight into the narrative of what an ungodly seed would ultimately produce...i.e. death, murder, etc. Again, you could be correct in that it was actually the very first time. Still, it is hard to imagine that that would be the case. Especially after Eve was first presented to Adam (thereby making him complete). I enjoyed your comment and it is food for thought. Be blessed.