本文描写作者应邀为老同学解决一起与学生的物理题“纠纷”。学生不同意单一的答案，觉得自己应该得到高分而不是零分，于是和老师协议邀请第三方公正的我解决问题。

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Some time ago, I received a call from Jim, a colleague of mine, who teaches physics. He asked me if I would do him a favor and be the referee on the grading of an examination question. I said sure, but I did not quite understand why he should need my help. He told me that he was about to give a student a zero for his answer to a physics question, but the student protested that it wasn't fair. He insisted that he deserved a perfect score if the system were not set up against the student. Finally, they agreed to take the matter to an impartial instructor. And I was selected. I went to my colleague's office and read the examination question. It said: "Show how it is possible to determine the height of a tall building with the aid of the barometer." The student had answered: "Take the barometer to the top of the building, tie a long rope to it, lower the barometer to the street, and then bring it up and measure the length of the rope. The length of the rope will be the height of the building."
不久之前，我接到我大学同事吉姆的来电，他现在是一名物理老师。他希望我帮他一个忙，给他其中一道考试题目的答案进行定夺。我答应了，但我不明白为什么他会需要我的帮忙。他说本来打算给他的一个学生那道物理题零分，但是那个学生坚持说这么做不公平。他坚持说如果没有“标准答案只有一个”这种制度，他肯定可以得到满分。最后，他们达成一致意见找一个不偏不倚的行家来裁决这件事。于是他们选择了我。 我去到我同事的办公室看了看那个问题。问题是这样的：“只给你一个气压计，你怎样运用这把气压计测量出一栋楼房的高度。”那个学生是这么回答的：“把气压计带到楼顶，然后在气压计上绑个长绳，用绳子慢慢将气压计从楼顶放下到一楼，然后再把气压计扯上来量出绳子的长度。这段绳子的长度就是楼房的高度了。