After Dai Yan got Zixi's reply, he didn't say much, and immediately retreated. He then went to visit Wei Xianghuishi www.biquge.info

For Dai Yan, this Hui Shi can be said to be the third "celebrity" he has seen since he crossed over to the Warring States period. Although he has also seen people like Zhan He of Chu and Tian Jiu, the giant of the Mo family, who can leave only a few words in history, these two are nothing compared to Hui Shi.

This Hui Shi Ke was the founder of the famous family (known as a debater during the Warring States period), his knowledge was known as the rich five cars, and the relationship between him and Zhuangzi was also praised by later generations. Dai Yan came to this era and brought with him a unique doctrine that combined the three civilizations - geometry and the rigorous scientific system behind it. However, the influence of this doctrine is still limited to Fengyi, and if you want to promote your own doctrine, debating with celebrities is the best way to promote it.

When Hui Shi saw that Ziyan had come to him, he initially thought that he wanted to talk about the affairs of King Wei Qixiang, but he didn't know that the other party had found him, but he never talked about politics, just purely academic exchanges.

"Keiko, Mr. Zeng Wen, the boy, is highly educated, knows astronomy and geography, and is known as the rich five cars. The kid dares to ask sir, what is big and what is small? Dai Yan asked.

Hui Shi replied without hesitation: "The greatest is the greatest, and it is called the great one; To the small without the inside, it is called the small one. ”

Dai Yan quickly understood what Hui Shi meant: the boundary without periphery (i.e., infinity) is the largest; There is no internal one, that is the minimal. In this sentence alone, Dai Yan knew that Hui Shi was really not to be underestimated, and he deserved to be the founder of the famous family. Dai Yan retorted to him and said: "Sir's words can be described as profound, but the kid dares to ask Mr., how big does Mr. know how big the world is?" ”

To this question, Hui Shi thought about the following and replied: "Childe asked how big the heaven and earth are in the lower world, and the lower ones didn't think so. In the view below, the sky and the earth are inferior, and the mountains and Ze are flat. Why? There is no difference either. It was said before that the one who has no outside is the greatest, but when the heaven and the earth are compared with the one without the outside, the heaven and the earth are small; The one without the inner is the smallest, and the swamp is compared with the high mountain, and there is no comparison between the two, so there is a mountain and a flat mountain. How big is the world that Childe asked, in my opinion, there is no standard for this question, and who can answer it? ”

Dai Yan then asked: "Since Mr. thinks that the sky and the earth are inferior, and the mountains and Zeping are flat; Without comparison, without standards, you can't know the size, and I agree with this principle below. Then the kid gave Mr. a standard, Mr. was originally from the Song Dynasty, and he should know the specific length of a mile. Since the gentleman thinks that heaven and earth are small compared to the greatest, then heaven and earth must have a boundary. What shape does the heavens and the earth think sir? How many miles is it? ”

It turned out that the killing move was here, Hui Shi sighed secretly. In the Warring States Period, in the context of a hundred schools of thought, each school of thought was constantly developing and strengthening itself. The best way to strengthen oneself is to debate with scholars of other schools, and as long as they overwhelm the other party and have a reputation for being good debaters, their doctrines will naturally be established. Hui Shizhi's fame is like this, he is famous all over the world for his good arguments, and with this name he can be the minister of Wei. Now he didn't pay attention, but he was asked by such a young man in his hometown, this is going to capsize in the gutter.

However, Hui Shi is not a vegetarian after all, and he replied: "Although the heaven and earth are large, they must have boundaries, that's for sure." However, if we haven't actually measured it, how can we know the specific size and length of heaven and earth? For example, the unspeakable ice of summer insects, summer insects don't know that there is ice, and can they talk about ice with it? This is also true. The specific size of heaven and earth is not known below, this one is below but not measured, and the other is that although heaven and earth are limited, their boundaries are extraordinary and reachable, so no one can measure their size. ”

"The boy knows what the gentleman says, but the boy will never agree with the words of the gentleman." Dai Yan replied, and then he said: "Sir thinks that heaven and earth have boundaries, and they are inferior to the greatest, and the boy also thinks it is inappropriate. Heaven and earth are two things, the earth is where we mortals dwell, and the heavens are above the earth. In the eyes of the boy, there are five heavens. One is the material heaven, that is, the heaven opposite the earth; The second is the heaven of domination, that is, the so-called emperor God, the heaven and emperor with personality; The three days of fortune are the helpless ones in life, and the luck in the dark is this; Fourth, the heaven of nature refers to the operation of heaven and earth; The five heavens of righteousness and reason are the highest principles of the universe. Heaven has this fivefold righteousness, what is it compared to the other? Compared with the sky, the outsider is also small. The earth is the dwelling place of mortals like us, and its size must be measured, and the size of the earth must be known, and it can be done below! ”

Hui Shi heard Dai Yan analyze the fivefold meaning of heaven for him, and felt that the way of thinking in it was very similar to his own dialectic theory. The core of Hui Shi's doctrine is "contract difference", the most important connotation of which is that all things are the same and different, and all its properties are not absolute, so in Hui Shi's view, Mount Tai can be regarded as small, and Qiu Hao can be regarded as big, to solve this kind of problem, must be justified. The fivefold meaning of Dai Yan's "heaven" can be said to summarize all the people's understanding of "heaven" in this era, which is also what Hui Shi has always advocated. However, then Dai Yan said that he could measure the size of the "earth", and Hui Shi couldn't understand it, and then he asked: "Dare to ask Gongzi how to measure the earth?" ”

Being able to force a top scholar to ask him for advice, Dai Yan couldn't help but feel secretly happy. He said in a big dialect: "The gentleman asked the boy how to measure the size of the land, and the boy should never hide his secrets, and tell him as much as he could." Before we do that, let's take a look at what the "earth" is. The earth is from the earth, and from the field, and it is the dwelling place of us mortals. But there are always places in the world where we mortals cannot live, such as mountains, rivers and lakes, deserts, and seas, and these places can be called part of the earth from below. To measure the earth, we must first know how the earth is shaped, Qi Dongye once said: The sky is round and the place, does Mr. think so? Zou Yan, the founder of the Yin-Yang family in this era, is estimated to have just been born, and the concept of the five elements of Yin and Yang has not yet been linked, but this kind of thinking has been there for a long time. Its origin probably originated from Dongyi, which was fused by the Huaxia people and then gradually spread all over the world.

Is the sky round? This was a common belief at the time, and so was Hui Shi. He replied, "I thought there was no problem with that." ”

"Sir is wrong again." Dai Yan rejected Hui Shi's opinion in a resolute tone, and then said: "The boy once heard that when two ships meet when sailing on the sea, one ship sees the other ship in the distance, it must first see the mast, then the sail, then the hull, and finally the bottom of the ship. If two ships are far away, they will see the opposite, and the last thing they see will be the mast of the other ship. The kid has personally verified that this statement is definitely true. The kid was puzzled by this, as the saying goes: the water flows low, the sea is flat, and the world is reasonable. However, if they meet on the same plane, far from what they see, there must be no difference between up and down and high and low, whether they are seen or far away, the whole ship must be visible and the whole ship is not visible, and there will never be the fact that the mast is seen first and then the hull. In this way, the argument that the earth is square is a fallacy, and the earth is definitely not flat. But what is the earth like? In the eyes of the boy, the earth should be a huge ball, and we mortals live in the place where this giant ball is indicated, and by measuring the radius and surface area of this ball, we can know how big the earth is, and the boy dares to call this giant ball the earth! And only this statement can explain the saying of sailing. ”

No way! Hui Shi cried out in his heart, human beings do not live on a flat earth, but on a huge ball? This simply subverted all of Hui Shi's previous concepts, and he immediately asked: "Since Childe thinks that we live on a giant ball, then there must be people with heads up and heads down, so wouldn't the people who live under this ball fall from the earth?" How can Childe tell if we are under the earth? ”

Dai Yan smiled knowingly and said calmly: "In terms of Mr.'s contract, if there is no comparison, there must be no up and down, and there must be a definition of what is above and what is below on the whole earth." If we were to dwell in the upper part of the earth, in the opinion of the gentleman, there must be no man on the other side of the earth, and all of them will fall from the earth to the heavens. But sir, do you know how we are able to live on the surface of the earth in peace? Even if I take out a stone and throw it into the sky, the stone will eventually fall to the ground instead of flying into the sky. In the boy's opinion, this is actually because I am attracted to the earth. ”

Hui Shi picked up a stone and threw it into the sky, and the stone fell back to the ground. Hui Shi carefully pondered Dai Yan's various remarks, and then he said: "In the future, you can first recognize what Childe said that we live on the earth, so dare to ask Childe how we measure the radius of the earth?" ”

"Since the earth is a sphere, the angle at which the sun shines directly at the same time must be different. We can dig a well in the first place, and if the sunlight shines directly into the whole well, then we can confirm that it is exactly noon. At the same time, we measure the declination of the sun in place B, which is directly north of this place, and then measure the distance between the two places, and according to these conditions, we can measure the circumference of the whole earth, so that it is not very easy to obtain the radius of the earth? In turn, although the boy did not travel all over the earth, the boy could still measure the radius of the earth and know the size of the earth. Dai Yan replied.

Hui Shi was silent, and this is indeed a good way. However, today's debate with this young man, what shocked him the most was that he denied the theory that the entire sky is round and the earth is round, which makes him feel like the heavens and the earth are overturned. Hui Shi is a master debater of a generation, but after debating with Dai Yan, he feels bad all over. He didn't dare to continue debating with this young man, he admitted today's debate, he needed to go back to recuperate, otherwise his whole body would collapse.

He looked at the young man with complicated eyes, said goodbye to him hurriedly, and then ran away.

Dai Yan looked at this famous master, and secretly felt a little proud in his heart, and his goal was finally achieved.