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Additional Information

Competing Interests

The authors declare that they have no competing interests. Andrea Ravignani is a Marie Curie guest scientist, not an employee, of Sealcentre Pieterburen.

Author Contributions

Andrea Ravignani wrote the paper, reviewed drafts of the paper.

Sonja Kotz wrote the paper, reviewed drafts of the paper.

Data Deposition

The following information was supplied regarding data availability:

The research in this article did not generate any data or code (because it is a review/theory article).

Funding

Andrea Ravignani has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 665501 with the research Foundation Flanders (FWO) (Pegasus2 Marie Curie fellowship 12N5517N), and a visiting fellowship in Language Evolution from the Max Planck Society. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.


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