Given the seeming intelligence of cetaceans, people are always tempted to compare them with humans and other animals. Studies on discrimination and problem-solving skills in the bottlenose dolphin, for instance, have concluded that its intelligence lies 'somewhere between that of a dog and a chimpanzee.' Such comparisons are unfair. It is important to realize that intelligence is a very human concept and that we evaluate it in human terms. After all, not many people would consider themselves stupid because they couldnt locate and identify a fish by its echo. Why should we judge cetaceans by their ability to solve human problems? The word 'dominant' in the passage is closest in meaning to