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The scenario of a dwarf mongoose engaging in territorial conflict with an outgroup dwarf mongoose illustrates a major dimension of social life across animal species, from the solitary to those with complex sociality: intraspecific contact with perceived outsiders. Though one prominent hypothesis posits that sophisticated cognitive adaptations are primarily driven by the demands of various behaviors within established social groups (e.g., cooperative response to predation), interactions with same-species outsiders arguably contribute comparably by favoring nuanced analysis (e.g., evaluation of relative physical status).