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Published online by Cambridge University Press: 30 October 2001
Rendall and Whitehead overstate the weak evidence for social learningin cetaceans as a group, including the current evidence for vocallearning in killer whales. Ethnographic techniques exist to testgenetic explanations of killer whale calling behavior, andadditional captive experiments are feasible. Without such tests,descriptions of learning could be considered pseudo-scientific, adhoc auxiliary assumptions of an untested theory.