Required Mathematical Intelligence

Chapter 93 Who is the Thief
The lights-out time has long passed, and the campus of a certain university is silent.

Suddenly, there was a burst of exclamation from the girls' dormitory building: "Catch the thief! Catch the thief!"

In the dim night of the campus, a black figure jumped out of a window in the girls' dormitory, and rushed up a small path.At this time, there was another black shadow chasing after him.

The boys came to chase the thief one after another. On the big lawn 300 meters southwest of the girls' dormitory building, two people twisted into a ball, kicking and beating each other.Everyone gathered around, and both of them let go.A said: "He was caught by me!" B said: "He was caught by me!" A said: "You are confusing right and wrong!" B said: "You beat him upside down!"

The two people's faces were red and red, making it difficult to tell the truth from the fake.Who is the thief?The two wore the same jacket and were about the same height. There was no third party to prove what they were doing just now, and the female students present could not identify which one was the one who stole in the dark just now.But the facts are in front of us: one of the two people must be a thief, and the other is a good young man who does what is right.

The classmates at the scene were stunned.At this time, a clever student came up with a good idea. With this idea, the real thief can show his true shape in front of everyone.You must have a rich imagination!So, if you were there, what good idea would you have come up with?

[Answer: Perhaps most people can answer this question, and they answer it like this: Let these two youths run the race again.Because since the good young man can catch up with the thief, the good young man must run faster than the thief.

This answer is generally justified.However, a classmate's answer was very innovative and original.

This student replied:

It is estimated that the proponent's intention is to let the two young people run a race again, so as to identify who is the thief and who is the good young man.I think it is very easy to wrong the good people and let the bad people go wrong if this method is used to solve the case.

Because human beings are conscious animals, various human activities are closely related to their psychological states.Now let's take a look at the psychological state of the thief and the chaser: the perpetrator must be empty in his heart when he commits the crime. Under the mental state of guilty conscience and fear, the activity of the motor central nervous system will be weakened, so that the muscles cannot be fully exerted; , because the perpetrator has to choose the escape route when fleeing, and has to spy on the front, rear, left, and right movements to prepare for "contingency", so the brain cannot concentrate on the running action.In this case, the perpetrator cannot run at a normal speed.

The mental state of the pursuer is just the opposite. He is full of righteousness and high spirits, and he doesn't have to be distracted to choose a path.More importantly, because the hunter also has a motivation to do good things for others and the society, which makes his nervous system in a very excited state, so when hunting, he usually exceeds his usual level of exercise and runs fast.

However, when a race is used to distinguish a good guy from a bad guy, the psychological state of both people will undergo a fundamental change.The perpetrator's excessive tension at the time of the crime has been relaxed.In addition, he is complacent about the temporary success of the plan of "beating him up and down", so he must "struggle" in order to change himself from a criminal to a "hero".In this way, the perpetrator is often in a better competitive state, so he will run much faster when running than when running.However, the good young man who acts bravely for justice is full of wimps. Regardless of his personal safety, he bravely catches criminals, but he is suspected.As a result, the activity of the cerebral cortex is suppressed, which affects the movement of muscles and joints.In this state of mind, the chaser's running speed is generally slower than when catching the thief.It can be seen that without psychological analysis, using this simple race method to distinguish good guys from bad guys must be unreliable.

Therefore, to distinguish who is the thief, we must find evidence to confirm it. ]
(End of this chapter)