Transcription: It's very difficult to measure the intelligence of whales. They're large creatures, we can't work with them in captivity, and we have a hard time working with them in the field for this kind of measurement. With dolphins, we have a little bit better idea. We have them in captivity, we know they're highly trainable, we know in the wild they form sophisticated social units, and they have very well adapted sensory-perceptive systems. To measure and compare directly with humans is difficult, even within humans, there's controversy about what is intelligence. We can't do that with dolphins directly ...
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