A hungry customer seated himself at a table in a quick-lunch restaurant and ordered a chicken pie. When it arrived he raised the lid and sat gazing at the contents intently for a while. Finally he called the waiter.
"Look here, Sam," he said, "what did I order?"
"Chicken pie, sah."
"And what have you brought me?"
"Chicken pie, sah."
"Chicken pie, you black rascal!" the customer replied. "Chicken pie? Why, there's not a piece of chicken in it, and never was."
"Dat's right, boss - dey ain't no chicken in it."
"Then why do you call it chicken pie? I never heard of such a thing."
"Dat's all right, boss. Dey don't have to be no chicken in a chicken pie. Dey ain't no dog in a dog biscuit, is dey?"