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Curry, O. S., & Sznycer, D. (2023). A broader theory of cooperation can better explain “purity”. *Behavioral and Brain Sciences*, 46, e300, Article e300. https://doi.org/10.1017/S0140525X23000389
[1]: https://files.osf.io/v1/resources/g52w6/providers/osfstorage/638dbc031af911189bbe9ddb?mode=render