[O]n the planet Earth, man had always assumed that he was more intelligent than dolphins because he had achieved so much — the wheel, New York, wars and so on — whilst all the dolphins had ever done was muck about in the water having a good time. But conversely, the dolphins had always believed that they were far more intelligent than man — for precisely the same reasons.

What It Means

This is a placeholder explanation generated by the low-overhead model. It interprets "[O]n the planet Earth, man had always assumed that he was more intelligent than dolphins because he had achieved so much — the wheel, New York, wars and so on — whilst all the dolphins had ever done was muck about in the water having a good time. But conversely, the dolphins had always believed that they were far more intelligent than man — for precisely the same reasons." in the context of "Douglas Adams, The Hitchhiker's Guide to the Galaxy (1979), Chapter 23." to mean that wisdom is timeless.