A very well thought out refutation of what I wrote.
This is incorrect. Not everything is the result of natural selection in the evolutionary process; there is sexual selection, exaptation, genetic drift, and plenty more. And like I said, the archaeological evidence points to a sudden shift in human cognition and not a gradual change. I cited the work of Ian Tattersall who is one of the most well known paleontologists in the field. And many evolutionary biologists have argued there is much more going on in the evolutionary process than natural selection, like Stephen Jay Gould.
If you actually read about it instead of pontificating you'll find that our sensory-motor system has pretty much been the same for hundreds of thousands of years. Which means the problem of externalization had already been solved before the language faculty first appeared. In fact, speaking isn't even necessary, any sensory modality seems to work except maybe smell. Touch and sign use the same linguistic abilities as speech; in fact in sign can you use many things in parallel where speech has to use linear order.
