Accepting the Povinelli-Henley Challenge

In the recent twenty-year retrospective issue of Animal Behavior and Cognition, Povinelli Henley (2020) argue that a host comparative studies into “complex cognition” suffer, fatally, from theoretical confusion. To rectify problem, they following challenge: alongside specifications higher-order capacity to be tested, provide hypotheses mechanism(s) necessary implement it. They spearhead this effort with discussion how Relational Reinterpretation Hypothesis (RRH) provides just such an account. first part paper, I RRH is neither nor sufficient explain second-order behavior in question. two, describe alternative hypothesis, externalism, does sufficiently account for Further, it opens new avenues research.