A food critic was sitting in a restaurant, when she called for the waiter. The man bustled over and asked, what on earth the matter was.

"Sir, there is a fly in my tea! Get me a new cup of tea immediately, or I will rate you one star!" She shrieked.

The waiter returned five minuted later, a cup of tea in his hand,this time he made sure it was fly free. He had just turned around when the critic shrieked once more.

"You fool! This is the same cup!"

How did she know?