Editing Cetacean intelligence (section)

==Problem-solving ability==
Some research shows that dolphins, among other animals, understand concepts such as numerical continuity, though not necessarily counting.<ref name="APA_smarter" /> Dolphins may be able to discriminate between numbers.<ref name=APA_math/>

Several researchers observing animals' ability to learn set formation tend to rank dolphins at about the level of [[elephant]]s in intelligence,<ref name="ABCScience" /> and show that dolphins do not surpass other highly intelligent animals in problem solving.<ref name="DolphinGuide" /> A 1982 survey of other studies showed that in the learning of "set formation", dolphins rank highly, but not as high as some other animals.<ref>Macphail, E. M. "Brain and Intelligence in Vertebrates". (Oxford science publications) Oxford University Press, 1982, 433 pp.</ref>