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    Primate cognitive neuroscience: What are the useful questions?
    Behavioral and Brain Sciences 21 (1): 128-128. 1998.
    Study of “theory of mind” in nonhuman primates is hampered both by the lack of rigorous methodology that Heyes stresses and by our lack of knowledge of the cognitive neuroscience of nonhuman primate conceptual structure. Recent advances in this field indicate that progress can be made by first asking simpler research questions.