Dreamland Guide

Everyone was amused by the crow.

　　 Alice said, "Madam, do you already know what the fourth dimension is? Can we really see it?"

　　 "If it's the same as I thought, then everyone of us can see it."

　　 "What do you think?"

　　 "Look in a dream."

　　 "Dream?" Alice was puzzled. "What do you think in dreams? We can't control our dreams."

　　 "We can't, but they can." Mrs. Larry pointed to Aoki, Situ, Duwa and Su Huilan and said, "The fourth dimension is not time, nor is it a gravitational surface, but spirit!"

　　 Aoki's heart shook, and suddenly he felt the mental field on the island become dignified, and the three suns in the sky seemed to be twisted.

　　 Alice still doesn’t understand, "But isn’t the dream just a chaotic world made up of our memories? It’s still three-dimensional! Where does the four-dimensional come from?"

Mrs. Larry smiled: "You can't control dreams. Of course, you don't know the magical effect of mental power. Ludwig and I have studied the independence of spiritual consciousness. Ludwig's research was once in-depth. Unfortunately, I didn't. Because of my talent in this area, I don’t know how to control the dream to expand into the four-dimensional space, and I’m not a physicist, so it’s better to ask a professional person to answer in this regard."

　　 After she finished speaking, she looked at Situ.

Situ said: "We can indeed regard dreams as a four-dimensional space. Dreams are supported by spiritual force, and the material that composes them is human memory. We can also understand it as a projection of the real world in the fourth dimension of the spirit. .

　　 The world we live in is three-dimensional. The projection of three-dimensional on two-dimensional will become two-dimensional, and the projection of three-dimensional on four-dimensional will also become four-dimensional. But just like the projection of two-dimensional to three-dimensional, it is only a distorted phantom, which cannot change its own dimensional properties. The projection of three-dimensional on four-dimensional is also a phantom. In addition, our human brains can only perceive three-dimensional things, so dreams still look three-dimensional, and because it is a phantom, it is not only distorted, but also chaotic and changeable.

According to Madam, if these characters are the projections of the three-dimensional characters left by the four-dimensional life on the two-dimensional plane, and their fourth dimension coincides with the dimension supported by the spirit in our dreams, then just put these characters Put it in a dream and restore it to three-dimensional characters with spirit, and consciousness can perceive the meaning they express. "

　　 Alice said, "But how to restore it? Isn't our brain unable to perceive four-dimensional things? Even if you can control dreams, isn't it still a three-dimensional world in the brain's cognition?"

Situ smiled and said: "We don’t need to see what the 4th dimension is like. Just as the lady said, the information encoding of civilization language is one dimension lower than the space where civilization itself is. These words are originally three-dimensional. Just restore it to three dimensions. Isn’t it what our brains are good at to make two-dimensional things into three-dimensional brains?"

　　 "The brain is good at this?" Alice said puzzledly.

　　 "Yes, think about it, is what our eyes see is two-dimensional in nature?"

　　 "No, it's obviously three-dimensional!"

　　 The crow suddenly interrupted and said: "Oh, stupid woman, have you played Super Mario?"

　　 Alice replied: "You are stupid! Stupid bird!" But curiosity still prevailed over her eagerness, "Of course I played Mario, what's the matter?"

　　 Crow said: "Mario is a two-dimensional creature. There is no objection to this, right, stupid woman?"

　　 Alice said, "No objection, you stupid bird, please don't call me stupid woman again!"

Crow quack nodded, "Okay, okay, stupid woman! Now imagine that there is a computer in front of you, Mario just trampled on a turtle, and there is a green...postbox in front of it? Oh, that’s a postbox, at least. What you see is the postbox, right? But from Mario's perspective, what does he see?...Qua, it's a line, Mario can't see the shape of the entire postbox, just a line standing in front of him , Right, stupid woman?"

　　 Alice was affected by the crow, as if she really saw the familiar game screen. She nodded unconsciously.

Crow continued: "Two-dimensional creatures can only see one dimension, and one-dimensional creatures can only see zero-dimensionality. So Mario sees lines, and snakes see dots. Humans are three-dimensional creatures. In the same way, people can only see the two-dimensional world. You think what you see is three-dimensional, and that's your brain, stupid woman, understand?"

　　 "Ah, it seems so! What the eyes see is the projection of an object on the retina. It is flat, like a mirror. It is our brain that restores it to three dimensions through the analysis of the spectrum."

Alice suddenly realized that she completely forgot that the crow was still calling her a dumb woman. "The creature sees things one dimension lower than the space he is in, and the information coding method of the language spoken by the lady is one lower than the civilization itself. The theory of dimensionality is exactly the same!"

　　 Mrs. Larry said to Aoki: "What a clever bird!"

　　 The crow stood on top of the green wood, raised its head and croaked a few times.

　　 Alice said: "But since our brains can automatically restore two-dimensional to three-dimensional, why bother to dream?"

　　 "Because we don't know from which direction it is projected into two dimensions."

　　 Situ explained, "The human brain cannot intuitively perceive and understand the four dimensions, so we can't see its projection direction. Accordingly, it is difficult to grasp the extension direction of the dimension when it is restored.

　　 Expanding one dimension to two dimensions in a three-dimensional space can be achieved in two directions; similarly, expanding two dimensions to three dimensions in a four-dimensional space can also be selected in two directions. In view of the uncertainty of the projection plane of these characters, it may be projected on any surface, and each surface has two restoration directions to choose from. If you think of a three-dimensional space as a cube, it has six faces. Each face and the fourth dimension can form a new cube. Adding itself and its mirror projection, there may be eight three-dimensional spaces and twenty Four planes. The projection direction of 3D text can be any plane. We need to judge its direction, just like a plane drawing of an object. You have to know whether it is a top view, bottom view or side view before it can be restored to a three-dimensional shape. In a four-dimensional space, this matter is obviously much more difficult. "

　　 "This is too complicated!" Alice exclaimed.

　　 Situ said: "Complexity is not too complicated. As long as the direction is right, it is nothing more than expending more mental energy to try."

　　 Aoki said, "Then try."

　　 He always felt that the meaning of those words was jumping in his mind, just like an engineer saw an incomplete drawing without any annotations. Now that three copies of this blueprint have been put together, they have also found a way to restore it. With the combined power of him, Situ, Duwa, and Su Huilan, plus the scepter in his hand, the spiritual power must be sufficient. The fastest mobile phone update::

　　 Among those present, only Alice and Mrs. Larry are not the awakeners, and Mrs. is a linguistic authority. They will obviously bring her with them if they want to interpret the text. Alice knew they were about to start, and said anxiously:

　　 "Hey, can you bring me into my dreams too, and open my eyes too!"