On the first day, no one came looking for them. Su Tang and Mo Meng stayed in the hotel for a day. Yanjin came once in the middle of the way, and told them that he and Chen Mu were going out, but they came back soon and left. As Yanjin said, they did come back soon.

Mo Meng made up for sleep in the morning because of the all-night question, and just got up on time at twelve o'clock to have a meal, and when it was over, he threw himself on the question again.

She didn't believe it, and she really couldn't do it.

In order not to affect her, Su Tang did not watch TV, but nestled on the sofa and was watching "A Brief History of Time" borrowed from Mo Meng. But after only reading two lines, I couldn't stand it. She, who doesn't have any physical foundation, reads too hard. Naturally, her consciousness went back to the dream she had been last night.

Who is that man, and why does it become so real in the second half of the dream?

"Moe. Su Tang no longer embarrassed himself, put the book aside, saw Mo Meng looking up at her, and asked her, "Why do people dream?"

Mo Meng rolled her eyes, and her brain quickly strung together her understanding of dreams in words. She put down her pen, sat on the floor and leaned against the couch legs, and said, "When it comes to why people dream." To put it simply, when you fall asleep, some of your brain cells are still active. These active brain cells respond to your subconscious mind in a series of ways. And these reactions are manifested through your dreams. That is, why people dream. ”

"Does that person dream of something he has never seen, someone he has never seen?"

"Hmm......" Mo Meng touched his chin and thought in a deep voice. She thought for a moment and said, "Your question is not rigorous. The word 'never seen' may seem absolute, but there is something problematic. Because in a dream, people or things that you have 'never seen' may have evolved as a result of some people or things you have seen. Sigmund Freud said that dreams are mirrors of reality. Although I don't agree with his spiritual theory. But I agree with what he said. The opposite of dreams is reality, and without reality there are no dreams, they are like twin flowers. So ......"

"Well, wait. ”

Su Tang interrupted Mo Meng in time, she could still understand it before, but what is the opposite, the relationship between twins? For the first time, Su Tang felt that Mo Meng was the same as Chen Mu, not like a high school student who was only a teenager. Mo Meng's knowledge in front of her was wider than she imagined.

"You can just say the conclusion. ”

Mo Meng blinked, "I thought that if you were careful, you could understand it more thoroughly." ”

No, not really, you just say the conclusion. Su Tang smiled and didn't speak.

"In fact, there is no scientific explanation for dreams. My understanding is that dreams are a kind of disconnect of our brains from what we do during the day. ”

Su Tang had a headache, "What is separation." ”

"Speaking of which, then ......" Mo Meng suddenly stopped and said instead, "I will try to speak in plain language." ”

Su Tang stretched out his hands: Please.

"In biology textbooks, there is talk about what an individual is made of. When Mo Meng said this, he looked at Su Tang with a sharp heart, and sure enough, he looked at the other party with a confused face.

"Biology book, Tang Tang. ”

Su Tang smiled politely and decently, blinking.

Biology book, what is it?

"Okay. We know that biologically, the human body is composed of eight major systems, which are formed spontaneously by a number of organs connected together in an orderly manner. What about organs? Organs are made up of tissues that function the same way, and tissues are cell populations. Mo Meng helped Su Tang review his biological knowledge and continued, "The individual is the foundation of life, and a beating heart is the dominant feature of life. ”

"What is that recessive trait?"

"The hidden is here. "Mo Meng tapped his head with a pen," Pascal said, adding that man is a thinking reed. The thinking brain is the recessive trait that makes us human. Without brains, without thinking, then we can't be considered a human being. ”

Su Tang nodded, she could understand.

"So, how do you think that you are yourself?" Mo Meng changed her previous gentleness, her face suddenly sank, and she said in a wooden voice, "Since the brain is the main body, then whoever it wants you to be, you will think that it is yourself." Now sitting in front of me, are you really Su Tang, or is your brain telling you like this: I am Su Tang. You must be thinking, who am I? Is this really the idea that you think on your own, not that your brain throws this question at you and makes you think like that?"

"Hah, that's a long way off. Mo Meng withdrew from the state just now and touched his face, "It seems that I am still not suitable for seriousness." ”

However, Su Tang listened to her words and fell into deep thought, Mo Meng's words were very reasonable.

"Speaking of separation, this is a term I made up myself. Mo Meng said, "You don't have to doubt yourself if you are Su Tang or not, whether your brain has deceived you." Because human beings are different from other living beings, we have social interactions, we have relationships. Although our identity and brain can make decisions, we must also be recognized by the group. I know that you are Su Tang, Chen Mu knows, and all of us know it. If another person runs up to us and the brain tells her that she is Su Tang, this will not be recognized by us. ”

So, the brain knows that it is not omnipotent during the day. So at night, when we are out of our relationships and go to sleep, it has complete control over you, or rather, over your body. It wants you to meet someone and something in your dreams, easily. This kind of 'unauthorized decision-making' of the brain is called dissociation. ”

"So, in my dreams can I see anything I've never seen or felt?"

"Nope. Mo Meng was decisive this time, denying it without a trace of hesitation, "The brain has active consciousness, but it is impossible for it to jump out of its own body." All the decisions it makes are because of what you convey to it as an individual. Can you understand that?"

Su Tang can understand.

In other words, if in my dreams there really is a voice from someone I have never seen and never heard. Does that mean that this may not be a dream, but something that actually happened?"

Su Tang was frightened by his words, was it true?

Her words also made Mo Meng fall into thought.

"However, you have to make sure that the person you see is not a virtual character that your brain has mapped out of what you have seen and heard. Mo Meng said, "It's almost impossible to determine this. ”

No, Su Tang shouted in her heart, she could be sure.

She had never heard that voice before.