Do you discount the possibility that the Holy Spirit moved the writer of Genesis to record it as such?
Not at all. In fact, I fully expect the Holy Spirit did. Except that there was no writing or recording in those earliest of times in the "evolution" of the human intellect and understanding of the world God created. But the Holy Spirit simplified the message so it could be understood, recalled and passed along. Remember, back then, history was recorded in stories. Jesus still taught in parables (stories) as well to explain messages and concepts. I beleive, Genesis is largely symbolic. Humans are VERY unique in that we are aware of our existence and can create (similar to he who made us in his own image). This is the symbolic explanation provided when Adam and Eve eat of the fruit on the tree of "knowledge". They were made aware and with that comes the concept of right and wrong and evil.
I'll be sure to get some of the details on the messaging to God's first people when I meet him. For I am certainly curious.