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"You are old, father William," the young man said,
	"And your hair has become very white;
And yet you incessantly stand on your head --
	Do you think, at your age, it is right?"

"In my youth," father William replied to his son,
	"I feared it might injure the brain;
But, now that I'm perfectly sure I have none,
	Why, I do it again and again."
		-- Lewis Carrol