I've read that post. It's still a mistery to me the fact that there are people without internal monologues that can speak without any sort of problem. Chomsky and Berwick hinted that recursive language may have evolved as "an internal monologue" in their "Why Only Us" essay, where they surely can explain their evolutionary point of view better than me.
I guess if that there really are people without "the internal tool of thought", they should volunteer to be studied, especially with brain imaging and functional tests. They could help us understand more about where language comes from.
I guess if that there really are people without "the internal tool of thought", they should volunteer to be studied, especially with brain imaging and functional tests. They could help us understand more about where language comes from.