Unrelated to the question in the title, but a friend and I have often talked about this. Neither of us are in any way experts in psychology/neurology/etc. - we'

Unrelated to the question in the title, but a friend and I have often talked about this. Neither of us are in any way experts in psychology/neurology/etc. - we're lowly developers. However, to us it made sense that language increases the cognitive ability of the brain because it's like memoization. We now have a symbol to represent a concept. We don't have to re-compute it over and over again. So now we reference that symbol when we are thinking and can build upon it and attach new symbols. Without having to re-compute, so to speak, the whole underlying framework/structure we are better able to utilize our cognitive cpu. Whether that is true in any way is beyond me, but it made sense to us.