CALLING A COW'S TAIL A LEG
There is a story told about Abraham Lincoln who had a very heated argument with a political opponent. Lincoln asked his political rival, "How many legs does a cow have?"
"Four, of course," came the disgusted reply.
"That's right," agreed Lincoln. "Now suppose you call the cow's tail a leg; how many legs would the cow have?
"Why, five, of course," was the confident reply.
"Now, that's where you're wrong," said Lincoln. "Calling a cow's tail a leg doesn't make it a leg."