Have you noticed that many things in life follow a strange rule — you can never have three benefits at the same time.

Looking for an ideal partner? Handsome, business-minded, loyal and faithful, you can only choose two. Finding a smart partner is the same — beauty, intelligence, good personality, rarely all three at once. What about work? High salary, relaxed and leisurely, close commute — everyone struggles with this question.

Even policy design can't escape — taking care of ordinary people, no need to queue, and still gaining tangible benefits, you can usually only satisfy two of these. The dilemma for content creators is even more obvious: original content, consistent high-frequency updates, top quality — all three are almost impossible to achieve simultaneously.

These seemingly different choices all stem from the same fundamental principle. In economics, there is a classic concept called the **Impossible Triangle**, also known as the Trilemma. It describes three goals that a country's economy cannot achieve simultaneously: complete free movement of capital, full independence of monetary policy, and maintaining a stable exchange rate. There is an inherent contradiction among these three, and at most, only two can be achieved at the same time.

This economic principle is so universal because it fundamentally reflects the scarcity of resources and the objective existence of constraints. Resources within any system have an upper limit; to maximize one goal, you often have to sacrifice another. Every choice in life is made within this inevitable trade-off.