It is amazing to note that intelligence is not something general.
Biologists generally concede that the dolphin has a better brain than a human.
It is bigger both absolutely and also in relation to its host's body weight. It also has more gray matter surface. But even so, dolphins do not show our type of intelligence . Suppose we could implant a just born human brain into the place of the brain of a just born dolphin. This brain would learn within a dolphin society.