The girl behind the counter replied, "I'm very sorry, sir, but our delivery didn't come this morning. We're out of chocolate."
"In that case," the man continued, "I'll have two scoops of chocolate ice cream."
"You don't understand, sir," the girl says. "We have no chocolate."
"Then just give me some chocolate," he insists.
Getting angrier by the second, the girl asked, "Sir, will you spell 'van,' as in 'vanilla?'"
The man spells, "V-A-N."
"Now spell 'straw,' as in 'strawberry.'"
"Now," the girl asked, "spell 'stink,' as in chocolate."
The man hesitates, then confused, replied, "There is no stink in chocolate."
"That's what I've been trying to tell you!" she screams.
Moral of the Story: When trying to make a point, it is most effective to make your argument using examples and case studies.