Teacher Bai raised his eyebrows and glanced at it, and his tone was light: "It's not a student, go out." Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ”

Taishou was not angry, shook his head, smiled helplessly, waved his hand and sighed: "No way, Mr. Bai won't let me listen, let's go out!"

A group of teachers, leaders, and officials rushed out, the front row was empty, and Teacher Bai pointed and said, "Students standing in the back, sit in the front." ”

Dozens of students rushed up, Gu Lanlan pulled Yuan Chen, grabbed the window position in the third row, sat down quickly, and looked at him: This Teacher Bai is so cold, like a little dragon girl, I like it!

: An Sheng sat down and listened to the lecture well.

Gu Lanlan glared at him, turned his head forward, pinched Yuan Chen under the desk, let go of his hand, and sat down obediently.

After a period of commotion, the students sat down and the classroom fell silent.

The irrelevant people were gone, Teacher Bai's eyes softened, no longer as cold as Fang Cai, looked at the nearly five hundred students in the audience, and said, "I'm Bai Yan, teaching everyone naturalist classes, five sessions a semester." The various matters related to the special recruitment have been sent to the students' optical micrometers, so let's take a look at them first. ”

Nearly 500 people clicked on the virtual light screen of the optical micrometer, and there was an email, open it and take a look, which roughly read: The first-year special recruitment quota is a total of five people, and the assessment is divided into three major items: literature, martial arts, and naturalism, and the following details, each accounting for a certain proportion, with a full score of 100, and five classes are completed, and by the end of this semester, the top five in the total score will win, and they will be eligible to participate in the special examination jointly organized by the top ten universities in the solar system - Lingyun Examination, if they can pass, they can be admitted to any university, and they are not limited to the top ten universities.

In addition, if you are punished by the school, you will be deducted points: three points for criticism in the circular, five points for the lesser, and more than ten points for the major.

"It's almost the equivalent of Harvard, Oxford, Cambridge, Marley, Princeton...... These universities have unified enrollment, and Tsinghua University and Peking University may not necessarily be ranked ......" Yuan Chen saw it, and couldn't help but complain in his heart, "It's just that unlike the previous life, there are seven famous schools in the East in this world, and only three in the West, and most of them are mainly on the science and technology side, and there is even a seminary......"

At the end of the email, it is specifically stated:

"If there are students who have built a perfect memory hall or awakened the king of the nine powers, they will be exempted from the qualification assessment, the Lingyun test, and they will be admitted directly. ”

After a while, a boy raised his hand and asked, "Teacher Bai, do exempt students occupy those five places?"

Bai Yan said: "If there are less than or equal to five exempt students, each person will occupy a place. ”

Hearing this, the classroom was suddenly filled with a buzz.

"Doesn't that mean that if we have five exempt students in this level, no matter how high the others are, it doesn't make sense?" asked the boy after a moment of silence.

Bai Yan said: "Theoretically, yes. It's just that since the Lingyun Exam, there have been two records of exempted students in a high school, and there have never been more. The Hall of Perfection is about one out of 600,000 people, and the kings of the nine abilities are even rarer, and there is not one in tens of millions. Students don't have to worry too much about this. ”

There was a lot of talk in the classroom, and there was silence.

"Before class, I would like to ask the students a question," Bai Yanxingzi's eyes rolled, and each student felt that the young female teacher was looking directly at him, and his soft voice went straight to the depths of his heart:

"In today's world, science and technology are developed, mecha are rampant, abilities are in charge, genetically modified human bodies, artificial intelligence life can be seen everywhere, quantum computers are countless, even to the extent of consciousness reincarnation, ten years of hard practice in martial arts, blood and sweat condensation, can't withstand a 3,000-yuan laser gun hit, can't beat a homo sapiens who has downloaded the fighting program, and can't compare to a child wearing a set of orange-level mecha, students, what's the point of martial arts practice?"

Bai Yan retracted his gaze and lowered his eyes, "I hope that after the five classes, the students can have their own answers." ”

"Okay, let's get started. ”

"Stand up!"

"Hello teacher!"

"Hello students. ”

"Sit down. ”

Without turning on the holographic projection imager, Bai Yan pressed his hands on the podium and said, "There is a barber in the town, and he has set a rule for himself: give and only give haircuts to those in the town who don't cut their own hair, and strictly abide by it. Ask, should this barber give himself a haircut?"

The students were discussing, and Bai Yan's voice sounded: "Please answer, this question is worth one point." ”

A group of people looked at each other, staring at their own light micrometer screen, and had nowhere to write:

If it is a barber, the barber will cut his own hair, and he cannot be counted among the "people who do not cut their own hair", violating their own rules;

If he doesn't pay attention to it, because he doesn't cut his own hair, he can be counted as a "person who doesn't cut his own hair", according to the rules, he has to cut his own hair, but this goes back to the situation above......

A boy raised his hand to ask the student just now.

"Asked. Bai Yan said.

The boy stood up: "Teacher, this barber's paradox is a worldwide problem, including the collection of elements themselves, which is related to the essence of set theory, and almost shakes the cornerstone of the entire mathematical edifice, and no one can solve it, so it can only be forcibly avoided." Isn't it difficult for us high school students to answer?"

The classmates said yes one after another, Bai Yan looked at the boy and asked, "What's your name?"

"Student Dongfang Kun. ”

Bai Yan nodded slightly and said, "Dongfang classmate, you get one point." ”

"What!"

"Holy!"

"it!"

"I knew I had asked ...... too"

"It turns out that the score is outside the problem......

"Cheap kid......"

Gu Lanlan looked at Dongfang Kun, leaned over and bit her ear and said, "Little atom, didn't you make it difficult for the teacher when you were in junior high school, why are you so well-behaved now, watching others be in the limelight?"

The girl's warm breath lingered in her ears, crispy and itchy to the bone, Yuan Chen was indifferent, because they were too familiar with each other, lowered their heads, and said softly: "It's not that you don't know, when you have to learn, I never ask questions easily." This teacher Bai has some truth, this paradox questions mathematics, but her intention is not here, I guess the following is Goethe's incompleteness theorem, questioning the language......"

I don't know whether it was intentional or not, Bai Yan's eyes turned to the two of them, seemed to be a little surprised, turned back again, and asked, "Dongfang classmate got this point, does anyone think it's unfair?"

After a while, the students all had a great impression of this young teacher, and they didn't expect her to be unapologetic to the group of officials, but she was very generous to the students, and some people felt that this might be another scoring point, so they hurriedly raised their hands, and after getting permission, they stood up and said: "Teacher, Dongfang didn't answer the question, I don't think it should be scored." ”

"Your name?" Bai Yan asked.

"Student Liu Huang. ”

Bai Yan said: "Some questions are temporarily unanswered, and some questions are unreasonable, at this time, students must learn to question." Dongfang did it, so I got one point, Liu, do you still have questions?"

Liu Huang also knew each other, anyway, it was good to leave an impression on this teacher Bai, so he simply said: "There are no more students." ”

"You two sit down. Bai Yan began to tell stories again:

"The Sirius man asked the philosopher, 'How many toes does a philosopher have?' and the philosopher replied: 'Ten. The Sirius man listened, lifted six toes, sighed, and said, 'It seems that I will never become a philosopher.' ’”

There was a burst of cheerful laughter in the classroom, only a few students did not laugh, thoughtfully, Gu Lanlan glanced at Yuan Chen: Okay, little atom, I really guessed it for you.

Yuan Chen looked at her: What do you guess her intentions?

Gu Lanlan's blue eyes flickered: The Buddha said that it cannot be said.

Yuan Chen praised: It's really good!

: Needless to say!

“...... Whenever we talk about the elements themselves, about the concept of 'I', things often become a lot more troublesome, become left and right, contradictory everywhere, unable to have both completeness and wholeness, this is a theorem, called Goethe's incompleteness theorem, the paper is not very long, but the impact is very far-reaching, involving philosophy, mathematics, language, Computer science and other disciplines, and even cosmology have an impact, the link has been sent to the mailbox, students are interested, you can read the full text after class, I only quote one of the forms of conclusions: when we try to define a system to describe the world, this system is often falsified by ourselves. ”

"This is true of mathematics, and even more so of language. ”

"We rely almost entirely on this for our information exchange. Everyday life is fine, most of them are conventional words, the meaning is clear, and it will not cause big ambiguity, but when it comes to more essential things, when it comes to the fundamental definition, it is different. ”

"For example, when discussing philosophical questions such as 'who am I?' 'Where do I come from?' and 'where am I going?' we have to clearly define what 'I' is, what is 'coming', what is 'going', and the extended meaning of 'where', and in the end, we find that no matter how we define it, it will be overturned by the rest of the language system. ”

This is called the philosophy of language: all philosophical ideas and systems are expounded in language, but the language system itself is incomplete. ”

In the Taoist family, the Buddha said that it cannot be said, and if it is said that it is wrong, and the clouds beg me with sound and color, and cannot see it; in physics, it is random, wave-particle duality, the uncertainty principle, the probability cloud, the tunneling effect, the lack of reality, the breaking of symmetry, the distortion of space-time, the quantum mechanics, and the theory of relativity. ”

"So," Bai Yan concluded, "no one can fully explain the fundamental truth to you, and there is no theory that can explain all the phenomena in the world, if there is, he must be lying to you." I can't either, so what I have talked about in these five lessons is only true in my opinion, a relative truth that is closer to the absolute truth, but I hope that students can have their own opinions. ”

Whoa, whoa, whoa!

After a moment of silence, the classroom burst into applause.

Bai Yan stood quietly, like a quiet flower in the empty valley, and after the applause stopped, he began to speak again: "Most of the students are fifteen or sixteen years old, they are in adolescence, their blood is strong, they are young, and their secondary sexual characteristics begin to develop, so it is inevitable that they will be curious about the body of the opposite sex, which is a normal phenomenon, but some people either comfort themselves or taste the forbidden fruit......

Suddenly, a group of boys in the classroom squeezed their eyebrows, and some of the girls' faces began to turn red, and they quietly lowered their heads, pretending to browse the optical micrometer.

“...... Whether it's school rules or morality, I don't want to judge from him, I just want to say that if you are interested in martial arts practice, remember a little bit of Yuan Zhen is not lost. Bai Yan's tone was soft, his voice was cold, there was no discoloration, and he just treated it as usual:

"Yuan Zhen divides yin and yang, it is not just that little ***, falling red, but contains a subtle collection of spiritual, psychological, divine will and many other aspects, in the first step of martial arts refining and refining qi, it is equivalent to a key, catalyst, enzyme, although the amount is small, but the effect is very important. ”