"Yes! It's this university, in the basement of the Student Activity Center! What is a human centipede? Anyway, it's seriously hurt! You must believe me, comrade policeman, I swear I'm not kidding!! Please call the police immediately, and be sure to bring a large number of medical professionals, most doctors have not encountered similar situations! Who am I? Whistleblower information, right? I'm ......."

"What are you doing here?" Suddenly I was slapped on the back and I was so scared that my phone fell to the ground. When I looked back, it was Ah Huan??? …… No, it's a commentary. Ah Huan's twin brother, the one who has a single dormitory and an introverted personality. Although the appearance is very similar, there are great differences in dressing style, personality, eyes, posture, etc., and it is easy to distinguish them if they are classmates.

I picked up my phone: "I'm the victim's roommate, alkane, and now maybe I'm in danger too." I'm near the school cafeteria, please call the police immediately! ”

Calm, composed, I repeatedly stressed to myself.

"Please call the police immediately!" With that, I hung up. said to Ah Ping: "You and your brother are in the same group, you heard what I just called the police, right?" The police will be dispatched immediately, and when the peak of the class is approaching, there will be a lot of people coming to the cafeteria for breakfast, what can you do to me when people are coming and going? ”

"Can you calm down and listen to me first...... It doesn't make much sense to call the police, I am not an accomplice to him. I've been following the progress of his experiments for more than a year, and I've thought about stopping him, although in the end there is nothing I can do...... The result of this rebellion may not be helpful, but I may be able to help you, at least to get him to change the goal of the experiment, although the experiment will still be done, but if it can be delayed, it will be delayed...... Maybe after countless attempts, one time he will go back to the beginning and end it all......"

"What are you talking about? Why should I trust you? The people's police of our country can solve everything! You don't want to say that your brother is so powerful that he can—"

"Can you calm down first?" Ah Ping yelled at me, "Let's talk in another place, I'm really not with my brother, go to the school café, right?" The café is quiet and we can have a good chat. There are a lot of students there who don't have classes and start reading in the morning, and I can't do anything to you in front of everyone. ”

"A glass of American, extra strong." A cup of espresso is necessary to refresh my mind and make me more vigilant and attentive to the person in front of me.

"What do you have to say? The police will soon find me and protect me. ”

Ah Ping's expression was very serious: "What I am going to say next may sound ridiculous, but please believe me. Even if the police come and rescue them, your roommate will be disabled for life, right? I have a way to get your roommate back to before he was made into a human centipede, and that is, to get you back in time—"

"Poof!!" I spit out half of the coffee I had just served.

"Don't be surprised, please remain silent and listen to what I have to say. I secretly copied my brother's experiment manual, and if what was written on it was correct, on the night of May 28th, Brother Shui made you drink a bottle of blue potion, right? ”

"The drink?"

"That's right." Ah Ping nodded, "The human centipede experiment written in the experiment manual only officially started on May 31, and it was just preparations yesterday, so everything was in time." The principle of that potion is too complicated, so I'll explain it simply. It is a potion that allows your mind to be in a highly active and divergent state, so you can receive information from the future, and even memories. Of course, only the moment the potion takes effect, can you reach a level of mental activity that can accept future information. Just follow the method I said and you will be able to get your soul back in time......"

"Back in time? There are two mes? "I'm completely confused.

"No, it's the soul that goes back. Your soul now returns to your body then. It is impossible for the physical body to travel time in the true sense of the word. This kind of behavior, to be precise, is called backtracking. There are only souls that go back. Ah Ping added.

"Soul?"

"In layman's terms, it can be understood as memory."

"How can memories and souls be the same? One is the function attached to the human brain, the other is internal, and the only thing that determines me is mine—"

"Leave aside what you've learned. Have you ever heard of the ship paradox of Theseus? Ah Ping interrupted me.

"I've read it on the Internet before, replacing the parts of a ship one by one over time, replacing where it is broken, until one day every part and every inch of the ship's board has been replaced, may I ask if this ship is still the previous ship-"

"Yes, that's the paradox!" Ah Ping went on to state, "By the same token, let's say you have a heart transplant and your heart is replaced, and you are still an alkane. No matter how bad the liver is, if you change the liver, you are still alkane. Every organ in the whole body except the brain, even the tissue fluid and blood have been changed, you are still an alkane, right? ”

"Yes, because I remember that I had a lot of disasters and all kinds of surgeries."

"That's right! Then may I ask if you replace all the organs other than the brain of the whole body, you are still you, is it equivalent to removing the brain of a healthy person and transplanting your brain, you are still your alkane? ”

"But—"

"So memory, that's the only thing that can be sure that you're you, that's how people define the soul."

"If that's the case, if there is technology in the future to replicate my memories and transplant them into a robot, won't there be two me? But my soul is still in my body......" I came up with this example for some reason, maybe because I usually like to think about strange questions.

"Your idea is interesting. There are indeed two alkanes at the moment of transplantation, but they will be affected by the environment immediately, and you and the robot will have different new memories, which are different individuals. And there are two of you at the same time, is there anything strange about it? The function of your brain dictates that you can only control your own eyeballs to observe the world. Putting aside the mindset that this appearance brings to us, have you ever wondered why you are you? Why is it that when you dream about the past, you often have a third-person perspective, watching yourself do this and that in your dreams, when in real life you always only have a first-person perspective? It is the function of our human brain that determines that we can only observe the world from one perspective, and it also makes us have the mindset that we cannot exist two of ourselves at the same time. ”

"Hmm...... I don't understand it yet, but as you said, my memory is equivalent to my soul, so how can my soul go back to the past? I asked, and my brain was still frantically thinking about what Ah Ping had just said.

"Before the police come, let's try it first. First of all, a state of absolute relaxation is a prerequisite for the success of backtracking. Second, you have to get rid of the idea of going back in time. The world itself has many timelines, and we are only one of them. And if it's a slower timeline future, all you have to do is go back to the present. Relax yourself......"

I followed what Ah Ping said, took a deep breath, and lay down on the table. I didn't sleep well all night, even if I drank a glass of American, my eyelids were still very heavy. Indeed, that bottle of potion is definitely not simple, and with my physique, I can easily fall asleep even after drinking a cup of espresso.

"It's already the future, the present is not the present, it's the future, please believe in it in the back of your mind. Then, don't have any other thoughts in your mind than the moment you drink the potion. That's really now, relax, have to relax. Please try to pass on your soul to the present ......."

I closed my eyes completely, and all I could remember was the image of the potion being drunk. Is it? That's ...... Now? I'm going to wake up, back to the present, back to the present......

Why didn't Ah Ping speak? I want to open my eyes and take a look, but wouldn't that be relaxing enough? But why should I listen to what he says, going back in time? This kind of thing itself is very, I'm not sure if Ah Ping and that Ah Huan are in the same group. I couldn't help but open my eyes: "I said okay...... Groove ??? ”

"Is it that good? The whole building hears you screaming! Ah Huan looked at me with a confused expression.

I'm really, traversing, no, going back to memory???