Man always assumed that he was more intelligent than dolphins because he had achieved so much - the wheel, New York, wars and so on - while all the dolphins had ever done was muck about in the water having a good time.
- Douglas Noel Adams
How can you quote that and miss out the punchline?
But conversely, the dolphins had always believed that they were far more intelligent than man...for precisely the same reason.
The punchline's pretty implicit in the wording, honestly.
Hmmmmm.... I wonder when they will start with "So long and thanks for all the fish..."