logicalthinkinglogical thinking逻辑思维The teacher told the class the story of a man who swam a river three times before breakfast.老师给同学们讲了一个小故事，说有一个人早饭前要在河里游泳，横渡三趟。Johnny laughed约翰尼笑了。“Do you doubt that a good swimmer could do that?一asked the teacher老师问：“你不相信游泳很好的人可以做到这个？No, sir, answered Johnny, but l wonder why he did not swim it four times and get back to the side where his clothes were.”约翰尼回答说：“不，我相信，但我不明白他为什么不游四次，好回到他放衣服的那边呢。
