Being ostensive (reply to commentaries on `Expression unleashed'). Heintz, C. & Scott-Phillips, T. Behavioral and Brain Sciences, 46:45-53, Cambridge University Press, 2023.
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One of our main goals with ?Expression unleashed? was to highlight the distinctive, ostensive nature of human communication, and the many roles that ostension can play in human behavior and society. The commentaries we received forced us to be more precise about several aspects of this thesis. At the same time, no commentary chal- lenged the central idea that the manifest diversity of human expres- sion is underpinned by a common cognitive unity. Our reply is organized around six issues: (1) languages and their cultural evolu- tion; (2) the pervasiveness of expression in human behavior; (3) arti- ficial intelligence and ostensive communication; (4) communication in other animals; (5) the ecology and evolution of ostensive commu- nication; and (6) biolinguistics and pragmatics.

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