Heuser suggests that only humans have evolved four computational capacities, constituting a phylogenetic mind gap between humans and other animals.

An important perspective, go read all of it

Nice. I've always remembered the point that 'syntactic structures' are seen as biologically existent, and one 'use' that is made of them happens to be language (inflected by social usage): the real biological marvel is that 'imaginative' domain-crossing (metaphor becomes a crucial working concept) is itself infinitely generative in its possible 'uses' or 'applications', including the generation not only of impossible cultures but also the generation of a uniquely private language and contingent culture (obviously at odds with Wittgenstein's claims).

Reminds me a bit of Leary's 8-circuit model.

Science is all metaphor.