This story shows us that mathematics we have learned in schools might not be in accordance with the real world. Taking LINEARITY as an example, students in math major always begin with linear math (linear algebra, linear differential equations, and linear functional analysis…etc.) and finally little is taught in nonlinear math. However, there are so many things on Earth that are in a sense, nonlinear. The author also mentions a fact about nonlinearity, which is easy to see and quite interesting. Also, It is this fact that plays the role of foreshadowing and concludes this fictional story with a surprising (at least for me) ending.