“Try another Subtraction sum. Take a bone from a dog: what remains?”
Alice considered. “The bone wouldn't remain, of course, if I took it - and the dog wouldn't remain; it would come to bite me -- and I'm sure I shouldn't remain!”
“Then you think nothing would remain?” said the Red Queen.
“I think that's the answer.”
“Wrong, as usual,” said the Red Queen: “the dog's temper would remain.”
“But I don't see how –“
“Why, look here!” the Red Queen cried. “The dog would lose its temper, wouldn't it?”
“Perhaps it would,” Alice replied cautiously.
“Then if the dog went away, its temper would remain!” the Queen exclaimed triumphantly.
... Alice In Wonderland, Lewis Caroll