Kathy and Polly were friends but they liked playing tricks on each other.#
One day Kathy met Polly in the street. She said, "Hi, Polly. It's good to see
you."#
"How can you see me when I'm not here?" Polly asked.#
"what do you mean, you're not here?" Kathy asked. "Of course you're here."#
"No, I'm not," Polly said, "and I'll bet you ten dollars that I can prove I'm
not here."#
"Alright," said Kathy. "Ten dollars. Now prove you're not here."#
"Easy," Polly said. "Am I in Hong Kong?"#
"No," said Kathy.#
"Am I in Paris?"#
"No," said Kathy.#
"If I'm not in Hong Kong and I'm not in Paris," Polly said, "then I must be
somewhere else. Right?"#
"Right," said Kathy. "You must be somewhere else."#
"Exactly," said Polly. "And if I'm somewhere else I can't be here, can I? Ten
dollars, please."#
"That's very clever, Polly," Kathy said, "but I can't give you ten dollars."#
"Why not?" asked Polly. "We had a bet."#
"Certainly we had a bet," Kathy said, "but how can I give you ten dollars if
you're not here?"#
And with a laugh she walked away.&