regarding my previous post, I might add that in regard to point #1, that Eve knew the holy personal name of God and that it is not used previously in the verses of Genesis that have come down to us:
this shows that not everything is recorded in the Bible. Vatican II says that what was recorded what that which is important for our salvation. But, still, in order to understand the Bible, we have to make some sort of conclusion, or at least consider the alternatives.
Suppose there really was no Eve, then, somebody came up with this story, divinely inspired as we consider it, to show that mankind had an intimate relation with God from the beginning.
And the point here is, there was a belief in the one true God from the beginning. This was a radical departure from surrounding religions at the time.
This is important theologically throughout Genesis and the Bible. In Genesis, It’s also not written down on what basis God sent the flood of Noah’s day. Sure, it says mankind was wicked. But, (in the Jewish commentaries) it seems that God would be being unfair unless there was some explicit command(s), much as Adam and Eve had the command not to eat of the fruit. So, the Jewish commentaries (rabbis writing in the Talmud) have postulated a series of basic, minimal commands that these people must have violated. One of these must have been to worship only the one true God. …But, this is drifting from the main subject of this thread. The relevance is, not everything is explained in the Bible. The Bible is a book of faith and must be read so.