Was Köhler a German spy?
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There has been controversy regarding Köhler’s stay in the Canary Islands during World War I. A number of people, specifically British intelligence agents, believed he was a German spy. Evidently they were not convinced that his fascination with chimpanzees and bananas was sufficient explanation of his presence. Some contemporary writers still believe the issue is unsettled although no evidence has been produced that proves he was anything more than a Gestalt psychologist.