English Original
A dog owner claimed that his pet, when given money, would go to the news stall to buy a paper. His friend insisted on a demonstration and handed the dog some money. The dog trotted off, but an hour later he had still not returned with the paper.
"How much did you give him?" asked the owner.
"Five dollars."
"Well, that explains it. When you give him five dollars, he goes to a movie."
中文翻译
一位狗主人声称，他的宠物只要拿到钱，就会去报亭买一份报纸。他的朋友坚持要亲眼看看，便给了狗一些钱。狗小跑着离开了，但一个小时过去了，它仍未带着报纸回来。
“你给了它多少钱？”主人问道。
“五美元。”
“哦，这就对了。你给它五美元时，它就去看电影了。”