The author uses an apt allegory to introduce his important thesis:
In his book, The Pig Who Sang to the Moon: The Emotional World of Farm Animals, Jeffrey Moussaieff Masson writes: "I was told by some New Zealand sheep farmers that sometimes a particularly smart lamb will learn to undo the latch of a gate, evidently not an uncommon skill, and the sheep farmer then worries that the lamb might teach his less clever companions to do the same."
