There are several thoughts on who actually wrote Genesis, the first book of the five attributed to Moses. One is the "Tablet Theory" and is broken down as follows:
Tablet Starting Verse Ending Verse Owner or Writer
1 Genesis 1:1 Genesis 2:4a God Himself (?)
2 Genesis 2:4b Genesis 5:1a Adam
3 Genesis 5:1b Genesis 6:9a Noah
4 Genesis 6:9b Genesis 10:1a Shem, Ham & Japheth
5 Genesis 10:1b Genesis 11:10a Shem
6 Genesis 11:10b Genesis 11:27a Terah
7 Genesis 11:27b Genesis 25:19a Isaac
8 Genesis 25:12 Genesis 25:18 Ishmael, through Isaac
9 Genesis 25:19b Genesis 37:2a Jacob
10 Genesis 36:1 Genesis 36:43 Esau, through Jacob
11 Genesis 37:2b Exodus 1:6 Jacob’s 12 sons
Tablet #1 begins with the first verse of Genesis, and ends with the toledoth phrase in Gen.2:4a, “These are the generations of the heavens and of the earth when they were created.”
In this first tablet, there’s no author’s name in that closing verse. Who could have personal knowledge of what was written there? Only the Creator Himself. God could have written this with His own fingers (like He wrote in Exodus 31:18). I think it’s just as possible that He orally dictated it to Adam. At that same time He might have been using this as a teaching tool, showing Adam how to write, and maybe this served as Adam’s “practice slate.” Whatever the mode, God was the personal author of that first tablet, the actual creation account.
And so on for 11 tablets to get us through Genesis.
Am I selling this version? No, just pointing out that Moses as author is not an absolute. Did Moses author some of the five books attributed to him? Yes, there are many references supporting this:
Passages in the Pentateuch itself: Exodus 17:14 "Then the Lord instructed Moses, 'Write this down as a permanent record...'"
Exodus 24:4 "Then Moses carefully wrote down all the Lord's instructions."
Exodus 34:27 "And the Lord said to Moses, 'Write down all these instructions, for they represents the terms of my covenant with you and with Israel.'"
Leviticus 1:1 "The Lord called to Moses from the Tabernacle and said to him, 'Give the following instructions to the Israelites...'"
Leviticus 6:8 "Then the Lord said to Moses, 'Give Aaron and his sons the following instructions...'"
Deuteronomy 31:9 "So Moses wrote down this law and gave it to the priests."
Deuteronomy 31:24-26 "When Moses had finished writing down this entire body of law in a book..."
Passages elsewhere in the Hebrew Scriptures: Joshua 1:7-8 "...Obey all the laws Moses gave you."
Joshua 8:31-34 "He followed the instructions that Moses the Lord's servant had written in the Book of the Law..."
Joshua 22:5 "...obey all the commands and the laws that Moses gave to you."
2 Chronicles 34:14 "...Hilkiah the high priest...found the book of the Law of the Lord as it had been given through Moses."
Passages in the Gospels which show that Jesus and John the Baptizer believed Moses to be the author: Matthew 19:7-8 "...why did Moses say a man could merely write an official letter of divorce and send her away?", they asked. Jesus replied, 'Moses permitted divorce...'"
Matthew 22:24 "Moses said, 'If a man dies without children...'"
Mark 7:10 "For instance, Moses gave you this law from God..."
Mark 12:24 "...haven't you ever read about this in the writings of Moses, in the story of the burning bush..."
Luke 24:44 "...I told you that everything written about me by Moses and the prophets and in the Psalms must all come true."
John 1:17 "For the law was given through Moses..."
John 5:46 "But if you had believed Moses, you would have believed me because he wrote about me. And since you don't believe what he wrote, how will you believe what I say?"
John 7:23 "...do it, so as not to break the law of Moses..."
Passages elsewhere in the Christian Scriptures: Acts 26:22 "...I teach nothing except what the prophets and Moses said would happen..."
Romans 10:5 "For Moses wrote..."
But nowhere in the Bible is it specifically stated that Moses wrote the entire Pentateuch. Even if one believes in the inerrancy of the Bible, a case can be made that he authored only parts of the Torah, and that other writers added sections of their own and/or edited the resultant text.
Some clues that Moses didn't write the Pentateuch:
One passage describes a sequence of events; a later passage states that they happened in a different order. Presumably Moses would have remembered the proper sequence.
In the story of the Flood, one passage has Noah collecting two of each species while another passage states that he collected 14. One verse describes water coming from the heavens and from below the ground; another describes all of the water falling as rain. The duration of the rain differs between two verses.
Genesis 11:31 describes Abraham as living in the city Ur, and identifies that location with the Chaldeans. But the Chaldeans did not exist as a tribe at the time of Abraham; they rose to power much later, in the 1st millennium BCE
Deuteronomy 34 describes the death of Moses. It is difficult to attribute the description of a funeral to the deceased.
One passage in Genesis 33 has Jacob legally purchasing the location Shechem for the capital of the northern kingdom of Israel. Genesis 34 has Jacob's sons killing all of the men of Shechem by a deceitful trick.
The first part of the story in Numbers 25 about the rebellion at Peor referred to Moabite women; the second part said that they were Midianites.
Moses is described as going to the Tabernacle in a passage where the Tabernacle had not yet been built.
A list of Edomite kings included some monarchs who were in power after Moses' death.
Some locations are identified by names that were invented long after the death of Moses. One example is seen in Genesis 14:14; it refers to the city of Dan. That name did not exist until a long time after Moses' death.
There are many verses in the Torah that state that something has lasted "to this day". That appears to have been written by a writer who composed the passages at a much later date.
Numbers 12:3 states "Now the man Moses was very humble, more than all men who were on the face of the earth." (NKJ) If Moses were that humble, it is unlikely that he would have described himself in these terms.
Deuteronomy 34:10 states "There has never been another prophet like Moses..." (NLT) This sounds like a passage written long after Moses' death.
Food for provocative thought. Hence my original posted question. These are just a sampling of what is out there in discussions on the subject. There are tablets in early libraries that give detailed accounts of creation and the flood, with details of life in those times. These predate Hebrew writings. Does that in any way negate God's inspiration of the Hebrew scriptures? No, I think not.
Yes, very good provocative thought. Just as "tents of Shem" implies a school of teaching and not in the actual tent of one Shem, surely there was a tent of Moses
As I recall the statistical analysis of Genesis related to codes research, there are sections that are somewhat statistically different but the whole of Genesis is very different from all the rest of Scripture in terms of letter statistics.
Without having studied out every example you cite, there's certainly evidence that the Torah was completed by someone other than Moses, possibly Joshua, and maybe even as late as Samuel-- although the credit goes to Moses for 'downloading' it in the first place.