We have more advanced technology than cavemen yet no real evidence that we are smarter. Tools are a technology, and technology spreads. It is not intrinsically linked to an IQ. Cultures evolve faster than species. So using that as a basis of speciation is silly.
"yet no real evidence that we are smarter"
This is exactly what I am getting at. There is no real evidence that people living 25 thousand years ago were any dumber than people who live today. Over the course of 10 thousand years they would have developed tools even living in isolation. Tools made of wood or fibre wouldnt last long but bone and stone tools would.
Either they had such a small population that they dwindled and died out (meaning they were not around for the entire time period leading up to the introduction of the clovis) or they were not true humans
If they were thriving when the clovis arrived we would have lots of evidence of their existence. We know exactly when homo sapiens arrived in regions of europe because archeologists have found loads of crushed neanderthal skulls from the genocided populations of previous non homosapien inhabitants.
Over the course of 10 thousand years they would have developed tools even living in isolation.
I know it sounds like a given but that is in fact a big assumption.
Modern Africans still live in mud huts.
Evidence from tens of thousands of years ago is hard to find.
Either they had such a small population that they dwindled and died out
Another big assumption. There could have been multiple migrations of the same species that blended or competed.
If I go to one of the untouched tribes in South America and teach them to make crossbows and leave thier footprint will significantly change with my arrival, but not thier species type. Nor does the crossbow prove when they first got there.
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