If you take yourself as the center, there are three axes in the space, the first is up and down, the second is front and back, and the third is left and right, the first two do not need to learn, but "left and right" is a relative concept, the two sides of the body are just symmetrical, and there is no reference point that can be compared, which causes some people in life to be unclear about the concept of left and right...

This is a popular science article called the Wonder of Life, which not only analyzes the establishment of the concept of left and right, but also attaches some popular science survey results, roughly records the proportion of people of different ages who are not divided between left and right, and discusses the reasons for the left and right indifference... Although it was not clearly pointed out in the end, what caused the discrepancy between the left and right, it also gave Xu Yan a lot of inspiration.

"I see!"

Xu Yan's eyes flickered, and he muttered to himself.

This paper gave him great inspiration and opened a new door for him.

He knew before that Jiang Danian was not really left and right, but it took a certain amount of time to react, and he couldn't figure out the reason at the time, but now after reading this paper, he suddenly understood.

The concept of left and right is different from the front and back, you need to determine a reference point first, which can be distinguished, the establishment of the concept of left and right, usually to the age of five or six, at this time the teacher will teach children to write with the right hand, but also at this time they have the concept of left and right in their hearts, and also have a reference, through the comparison with the reference, so as to distinguish the left and right.

First distinguish between left and right, and then as you grow older, in countless times of discrimination, a kind of reflection is formed, and you no longer need to go through conscious thinking, and then you can really distinguish between left and right.

Of course, not everyone can form this instinct and reflex, a large number of people can form this reflex in their growth, but there are also a small number of people, even if they are adults, they still can't be separated.

Of course, there is no distinction between left and right, which is different from the left and right in the era of children, children really do not distinguish between left and right, and adults do not distinguish between left and right, it is impossible to judge left and right at the first time, and it takes a time to think and react, Jiang Danian belongs to this kind of thing.

The paper was accompanied by several reports, one of which was counted in 1996, in which a survey of 2,000 people was conducted and 14 were found to be 17-29 year olds. About 6% are not divided, but after the age of 60, there are only 3. There is no distinction between 2% of people, and the same phenomenon still exists in women.

Originally, he thought that people who were not divided between left and right were as rare as giant pandas, but after reading this report, I realized that I was too taken for granted, and the proportion of left and right is not only not low, but on the contrary, it is quite high, but most people don't care, and even many people don't know that they don't know that they don't know that they are left and right, because this has little impact on life, and when you need to distinguish between left and right, you only need to think silently for a few seconds, unless it is a specific group of people, The queue of soldiers is on this list.

Jiang Danian is not divided between left and right, and belongs to a specific group of people, so he is unfortunately regarded as a typical example and has become the laughing stock of the new soldier company.

After digesting the information he saw in his mind, Xu Yan couldn't help frowning, although the ratio of left and right would decrease sharply with age, but it was useless, because he didn't have time to wait until Jiang Danian was sixty years old, so he had to think of other ways.

His eyes flickered, Xu Yan couldn't help but look at Jiang Danian's bed, but he was surprised to find that he was not on the bed, he raised his eyebrows, and said in surprise: "What about Danian, why haven't you come back yet?" ”

Hearing Xu Yan ask, Yuan Guoqing glanced at him in surprise, and saw that he was not pretending, so he said: "He was stimulated by your words, and now he is still practicing turning left and right on the playground!" Saying that, he sighed lightly and said regretfully: "Hey, Da Nian is the most diligent person I have ever met, but unfortunately his talent is indeed too low, and he was born with a tendon missing..."

Xu Yan patted his head, then remembered what happened before, and without even saying hello, he hurried out of the dormitory, and soon came to the playground, but saw that under the dim street lamp, Jiang Danian kept spinning like a top, and the light sprinkled on his slightly baby fat face, showing boundless loneliness and gloom.

Xu Yan's pupils contracted, and he couldn't help but regret it greatly, although Jiang Danian was not divided between left and right, but he was very diligent and never lazy, which proved that he also wanted to be motivated, and he was also eager to stay in the recruit company, and if he scolded him so much, it must have hurt him a lot.

As soon as he thought of this, Xu Yan strode over and said, "What effect can one person practice, why don't I help you shout slogans!" ”

Hearing Xu Yan's voice, Jiang Danian suddenly raised his head, and when he saw that it was really him, he couldn't help but exclaim: "Xu Yan, you... What are you doing here? ”

"I'm sorry for what happened just now, I shouldn't have scolded you like that." Xu Yan said apologetically.

Jiang Danian shook his head and laughed at himself: "No, I'm stupid in the first place." ”

Jiang Danian's appearance made Xu Yan feel more and more guilty, and he said loudly: "On the contrary, you are not stupid at all, on the contrary, you are very smart." ”

"Don't comfort me, I know my own business." Jiang Danian glanced at Xu Yan gratefully, thinking that he was comforting himself.

"I'm not comforting you, I'm telling the truth." Xu Yan said loudly, and said in front of Jiang Danian's puzzled gaze: "Yes, you are left and right, but this can only show that your sense of direction is a little worse, and it does not mean that you are stupid." ”

"Isn't it stupid to be left and right?"

"Of course, I just researched it and found that the proportion of left and right in the population is not low, 17-29 years old, there are 14. 6% of the people are left and right. Xu Yan paused and continued: "It's incredible, what's even more incredible is that these survey groups are either doctors or professors, or college students, with very high IQ and education, but it is precisely this kind of person who is not easy to distinguish left and right at the first time." ”

"That doesn't prove that I'm smart." Jiang Danian is not confident, and he seriously lacks self-confidence.

"Of course, this is not enough to prove, but didn't you answer the question I took Luo Yifei before, this question covers a wide range of knowledge, which is far beyond the level of ordinary high school students, but you can answer it, aren't you smart?"

"That doesn't help me tell the difference!" Jiang Danian said in a low voice, what he cared about most was this.

This sentence stumped Xu Yan, Rao was able to speak well, and in the face of Jiang Danian's question, he couldn't help but be a little short of words, and said sullenly: "Yes, I can't!" ”

"Isn't that stupid!" Jiang Danian's face became more and more gloomy.

"You can't say that, the difference between left and right can only mean that your sense of direction is a little worse, and it doesn't represent other aspects of you." Xu Yan persuaded dryly, seeing that Jiang Danian was a little absent-minded, and said: "In fact, the left and right are not fixed, and the research has found that with age, the proportion of left and right will be greatly reduced, and the proportion of 17-29 years old will occupy 14." 6%, and by the age of 60, that percentage has dropped to 3. 2%。 ”

Jiang Danian's mouth squirmed, not only was he not encouraged, but he became more and more depressed: "When I reach the age of 60, I don't say if I can tell the difference between left and right, even if I can really tell the difference between left and right at that time, the recruits of the recruit company have changed dozens of stubbles like water." ”