The Real Answer to the Ultimate Question of Life, the Universe, and Everything is, undoubtedly:

The Crux of the Biscuit is the Apostrophe.

And the Real Ultimate Quesion itself is, of course:

( Guessed this, haven't you? )

As I was randomly flipping through the pages of “Alice” last night, I made a discovery that hopefully would bring us a bit closer to finally figuring out Life, Universe, and everything. This is not yet the Question itself, but a solid hint indeed.

At this moment the King, who had been for some time busily writing in his note-book, cackled out ‘Silence!’ and read out from his book, ‘Rule Forty-two. All persons more than a mile high to leave the court.’

Everybody looked at Alice.

‘I'm not a mile high,’ said Alice.

‘You are,’ said the King.

‘Nearly two miles high,’ added the Queen.

‘Well, I shan't go, at any rate,’ said Alice: ‘besides, that's not a regular rule: you invented it just now.’

‘It's the oldest rule in the book,’ said the King.

‘Then it ought to be Number One,’ said Alice.