He came across this entry.
It said: 'The History of every major Galactic Civilization tends to pass through three distinct and recognizable phases, those of Survival, Inquiry and Sophistication, otherwise known as the How, Why and Where phases.
``For instance, the first phase is characterized by the question How can we eat? the second by the question Why do we eat? and the third by the question Where shall we have lunch?''
He got no further before the ship's intercom buzzed into life.
``Hey Earthman? You hungry kid?'' said Zaphod's voice.
``Er, well yes, a little peckish I suppose,'' said Arthur.
``OK baby, hold tight,'' said Zaphod. ``We'll take in a quick bite at the Restaurant at the End of the Universe.''