"I really want to know what your logical thinking is." This is the first sentence that Yukawa said when he made his debut, when he was playing chess with KUSANAGI. KUSANAGI is a policeman, but he is also a friend of Yukawa. He sometimes comes to the 13 research room of the Physics Department of Imperial Capital University where Yukawa is located to kill time. Judging from the fact that Yukawa has mentioned the word "logic" many times and can tell how long it will take for the next game of chess, he attaches great importance to time and logical thinking.

When police officer Kishida first met Professor Yukawa, he said, "... I have admired Professor Yukawa's name for a long time. I heard that you have helped the police solve cases many times. The name' Master Galileo' is very famous in our department. "

From here we can know:

1. Yukawa has helped the police solve cases many times and is quite famous in the police station.

The name Galileo shows that this person is rigorous in logical thinking and likes to get the truth through experiments.

It is the representative of fairness, justice and rationality.

After police officers KUSANAGI and Kishida explained the progress of the case to Yukawa, Yukawa reminded the police that if the suspect is the real murderer, he may suffer in the future. Obviously, Yukawa learned from the conversation between the police and the suspect Keiko Huagang that Keiko may have certain anti-reconnaissance ability.

When discussing the case with police officer KUSANAGI, Yukawa informed KUSANAGI of his experimental results, and repeatedly asked the police who had no clue to put the investigation back on track. Yukawa finally learned the truth of the case and told KUSANAGI with a painful and complicated emotion, but only if KUSANAGI was a friend rather than a policeman.

This shows that on the one hand, Yukawa doesn't believe that the stone god he knows is stupid enough to kill for love; On the other hand, Yukawa doesn't want to believe that Stone God is willing to give up his dream of mathematics, and he doesn't want to see the talent of Stone God wasted on meaningless things.

Yukawa, who has always been sensible, is entangled in the love sensibility of the stone god, but he knows the truth but is unwilling to expose it to the police. Fairness and justice are constantly being tested in the face of human nature.

Yukawa was surprised when KUSANAGI told the police officer that the suspect lived next door to Shi Shenzhe. It turned out that the two met in college. At that time, Shi Shen was particularly outstanding in school, and even Yukawa once described him as a "genius". However, after learning that Shi Shen became a high school teacher instead of continuing to do research at the university, Yukawa felt a little incredible and lost.

Yukawa got the address of Stone God from the police and went to see him that night. Although they have been friends for many years, they have chosen different directions since school-a mathematics department and a physics department; One likes analogical reasoning, and the other pays attention to experiments. The former is a stone god, and the latter is Yukawa. This setting doomed two people to have an opponent in this book.

When Yukawa is free, he will come to Shishen, take a walk, talk about math and murder. However, with the deepening of the case investigation, Yukawa gradually put doubts on the stone god. After constant exploration, observation and experiment, Yukawa discovered the truth.

Yukawa went to talk to the stone god and told his own reasoning. Stone God knew that Yukawa had discovered the truth and chose to turn himself in. Yukawa received a heavy blow when he learned that Stone God had surrendered himself. He went to the Stone God again, only this time in the interrogation room. He said to the stone god, "I feel extremely sad that your mind ... your brilliant mind has been used in such a thing." I have lost my only opponent in the world forever. "

This is a lose-lose outcome. At the end of the story, Yukawa lost a close friend, a respectable opponent and a once-in-a-century mathematical genius. Yukawa knew that the great sacrifice made by Stone God was to make the people he loved live a happy life, but Huagang Shizuko knew nothing about it and even planned to spend the rest of her life with others. Yukawa felt distressed and sorry for his friend's silent dedication and unrequited love. He didn't want all this done by Stone God to be worthless, so he decided to tell Huagang Jingzi the truth, let her understand the mind of Stone God and let her make her own choice. Even if the consequences of doing so will make all the efforts of the stone god go to waste.

Happiness is not forced laughter or guilt. Only true liberation and letting go of everything is happiness.