What is the difference between Porsche making a 'family' of sports cars and a nested hierarchy?
A nested hierarchy is a special and very unusual arrangement of items.
All items must be placed in a labeled container.
No two containers may share the same label.
Containers may be placed inside containers.
All items in any container must have the property named by that container and all containers containing that container.
All items that have the property named by a by a container must appear n that container and no other,
So the difference is that no significant number of vehicles or any man-made objects can be arranged in a nested hierarchy. Many have tried, none have succeeded. Whenever anyone does produce a nested hierarchy of man-made objects it's trivial to produce an example that breaks the nesting.
Maybe I can post Michael Denton's allegedly nested hierarchy of vehicles to see if you can figure out where it fails. There's lots of possibilities.
Now, the fact that life can be arranged in a nested hierarchy of literally hundreds of millions of items is incredibly unusual in the universe of all possibilities of relationships or lack thereof. It demands explanation. Further, there are two independent ways of producing a nested hierarchy of life and they agree almost exactly.
If the first parts of Genesis are allegorical, when does the allegory stop and the literal begin?
Ah, there's the rub. You are probably one of those who's scared to death of losing your get-out-of-hell-free card. If you have to decide what's literal and what is not, you might decide wrong, and then it's the fiery pit for you, boyo. So you avoid the problem by deciding everything is literal.
Which immediately leads to no end of contradictions and a worldview that has no connection to reality.
Step up to the plate, belly up to the bar, and decide.
So... you think God created some species of animal and it thrived for a time and then died out so God created a new species that was very similar to the original species but had some modifications, but that also died out after a number of years, so God tried again... and again... and again... until he finally hit upon a suitable design - and those are our modern species
All in a few thousand years. But wait... didn't all those animal exist at the time of the Fludde?
I don't feel any need to try to prove it. It remains a fact that if God inspired the writers the writing has no errors and should be taken as God's own communication. My opinion is irrelevant, as is yours.
So your unsupported opinion is a now a fact?
You have obviously acknowledged that your opinion is unsupportable and is just as irrelevant to reality as mine. Personally, I doubt God dictated the bible but I don't claim any certainty; because such opinions are unsupportable.