I feel like this is one of those "of course" papers that people will dismiss, but it is good in science to confirm via orthogonal methods things that ought to b

I feel like this is one of those "of course" papers that people will dismiss, but it is good in science to confirm via orthogonal methods things that ought to be true[0]. All evidence points to language evolving for the purpose of communication, so of course its primary function is communication. It was only later co-opted for use in thought. [0] I like the analogy of a subway network. Something like a star topology is unreliable because you have one problem and a whole swath of the city is inaccessible. But if you start building secondary and tertiary links between stations, you get robustness. Even if there's a problem or two you can still get anywhere.