the writers of the Bible don't give us very many interpretive principles that enable us to be absolutely certain, clear, infallible, and/or comprehensively systematic in our reading and understanding of the Bible.
Right you are.... therefore..... read it and take it as it was written.....
The very first chapter of the Bible tells us some history. History of our earth and all that is in it, on it and around it. Nobody was here to see it but God inspired a man to write it down. That man, to all of my knowledge, was Moses. Moses was a brilliant man who was educated by the Egyptian elite. He observed and saw many great wonders of God's ability and events God accomplished as Moses was told they would. He was even disciplined by God for not doing as God said.
This very first chapter and book of the Bible would be, to me, the most logical book to be read and understood, exactly as it is written. It would make no sense, for God, to begin His book of instruction, to His creation, with a mythical exaggeration of supernatural events.
Apply this logic with the numerous places in the Bible that tell us that we are to believe God rather than man. That man's wisdom is that of fools. That the knowledge of men will be useless when compared to the knowledge of God. That man's ways are not God's ways..... And you have a formula that tells us to believe God's word over the rambling, babbling, assumptions men have based on the observations of men.
Combine that with the simple fact that the events of Genesis are well within the abilities of God.
Occam's Razor would then suggest that:
God can do it. Has the ability.
God said He did it.
It was recorded by a very intelligent and educated man who was instructed by God to write it down.
Therefore, it happened just as Moses wrote it as instructed by the God who did it and reinforced by His son, Jesus Christ.
Also:
Therefore, any observations of men, assumptions by men, measurements by men, calculations of men, pondering s of men, teaching of man's ideas that contradict the written word of God....is folly.