Douglas Adams

‘Difficult,’ said Frankie. He thought, ‘How about, What’s yellow and dangerous ?’
Benjy considered this for a moment.
‘No, no good,’ he said. ‘Doesn’t fit the answer.’
They sank into silence for a few seconds.
‘All right,’ said Benjy. ‘What do you get if you multiply six by seven ?’
‘No, no, too literal, too factual,’ said Frankie, ‘wouldn’t sustain the punters’ interest.’
Again they thought.
Then Frankie said : ‘Here’s a thought. How many roads must a man walk down ?’
‘Ah !’ said Benjy. ‘Aha, now that does sound promising !’