That's not how it works. This is a magical story, a myth. If you look at myths from other religions, or the stories of saint's lives, or the tales of Alexander and Charlemagne, we don't try to establish the truth behind the magical elements, we take those as embellishments. The life story beneath the magic, the biography, that one we can try to study historically.It is all possible. But because it is an oral and recorded story, maybe long before the story was chosen to put into the Bible so the reasonable thing is that there is some even small real story about it.
The figure of Moses is interesting enough without taking all those magical elements as truth. He might be historical, or he might be a personification but in any case we don't have to believe that he was a lost prince picked up from a basket afloat on the NIle to see that his is a story of redemption. How that redemption ties in to lawgiving is a good subject to study. How it got tied to (most probably ahistorical) wandering in the desert is another.
But if you really want to try to find the truth of magical embellishments, I've got a list of things you might want to research:
- Did a dinosaur survive in the Caucasus for St. George to fight?
- Is there geological evidence that Sjaelland once lay in a lake in Sweden?
- Is there a rock porous enough to stick a sword in it yet sticky enough that you can't pull the sword back out?
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