The "brain in a jar" is a hypothetical scenario elaborated by Hilary Putnam in his 1981 book Reason, Truth, and History.

"A man (assuming yourself) was operated on by an evil scientist, and his brain was cut out of his body and placed in a vat containing a nutrient solution that kept the brain alive. The nerve endings of the brain are connected to a computer, which is programmed to send information to the brain in order to keep it hallucinating that everything is completely normal. For him, it seems that people, objects, and the sky still exist, and his own movements and body sensations can be input. This brain can also be fed or intercepted (the memory of the brain surgery is intercepted, and then the various environments and daily life that he may experience are entered). He can even be coded and 'feel' himself reading a funny and ridiculous text here. ”

The most basic question about this hypothesis is: "How do you guarantee that you are not in this predicament?" ”

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During the Sneak Attack......

Time passed little by little, and Tu Shi became familiar with the new sword little by little. Under the thick layer of mud, he imperceptibly raised his hand, put it down again, and repeatedly, so as to adjust the feel. Every slight tremor in his fingers will faithfully be transmitted to the sword. He was so distracted that he even forgot about his injured left hand and the outside world, as if there was only this sword left in heaven and earth. This is a mysterious and mysterious realm, and it is impossible to elaborate. He was not asleep, but he was not awake; He is physically in this world, but his mind is nowhere to be.

…………

When Tu Shi "closed" his eyes, the illusion created an absolutely dark world for him, and the only thing he could feel was the sword in his hand. He regained the feeling he had when he attacked the Thorn.

Master Zuo said that a person's breathing, heartbeat, pulse, and qi and blood movement will cause the body to tremble slightly, and this tremor will be transmitted to the sword, and the sword will tremble.

People in the illusion can not need all physiological activities, why does this sword still tremble?

It's the heart that's shaking.

The shaking of the sword stopped, and in an instant it reached what Master Zuo said, "extremely quiet".

Tu Shi opened his eyes with some regret. It's too fake! Obviously he can't do it like water, but he can say that he is quiet, when he is a fool? This kind of "extreme quietness" in the illusion is at his fingertips, but it does not help him to master the real "extreme quietness".

As long as he has imagination, the illusion can make him omnipotent, in other words, any way he can think of to "get out of the illusion" will be realized by the illusion, but ironically he can't get out of it. He is like sleeping at night because of the urgency of urinating, and he finds the toilet in a dream to relieve himself, but it doesn't help, the bladder should explode or explode, and he always has to get up. The question is that in reality, there is still a stimulus to urinate, can there be any stimulus in the illusion to wake me up?

"Once you want to leave in the fantasy world, people have desires, and then they have demons, but if you don't want to leave, don't you even have to give up the idea of leaving? Ah, I can't figure it out, come and help me...... master."

As soon as Tu Shi finished speaking, the right master Haiqing Zhenren suddenly appeared in front of him, fluttering like a fairy, and said to him: "You can't get rid of any illusion, if you are stupid, you should be punished." ”

"Don't think I don't know you're an illusion! Ahhh Tu Shi hugged his head in pain.

Master Zuo Yi Wuya didn't come out of nowhere, stood side by side with Haiqing Zhenren, and said proudly: "Look, what kind of Taoist skills do you learn if you don't have a bright brain, how good is it to learn martial arts from me obediently?" ”

Tu Shi smiled bitterly, and with a wave of his hand, the two mentors disappeared.

The illusion is a reflection of his heart, and what the illusion says to him is actually his own heart. He also felt that he was very stupid, if learning Taoism required philosophical thinking ability, I am afraid that he would not have any hope of achieving success in this life, and it would be almost the same if he was replaced by Liu Dacai.

The sea of golden clouds shook like a strong wind, revealing a small utility room. There was a young man wearing a holographic helmet in the room, and it was Tu Shi himself in reality. Tu Shi walked on the transparent ceiling, looked at this scene boredly, and snapped his fingers again. The camera zooms out, and an entire floor is in view, the computers in the hall are neatly arranged, many players are concentrating on playing games, and from time to time someone gets up to go to the toilet or goes to Xiaomei's place to recharge.

The scene of the Internet café disappeared, and suddenly an actress with a clever smile and only a bikini appeared, facing Tu Shi, reaching behind her back with one hand, and gently unbuttoning her bra-

Mommy stops!! Tu Shi's face turned red, and he hurriedly waved his hand to make the illusion disappear. Just kidding, if Master Right sees such an inappropriate scene, his own hand can be broken, right? Hurry up and think of something else......

There is a convenience store in front of you, the kind that is open 24 hours.

Tu Shi was stunned.

Dozens of people outside the convenience store watched, pointing. Standing in front of the store stood a bald drunk with big shoulders and a round waist and a rough voice, and a hairy boy who was shaking from his shoulders to his hands.

Although the hairy boy's face was blurred, Tu Shi was very sure that it was him.

The whole sea of clouds began to boil. His hands began to tremble again, so much so that the sword at his waist that he was carrying trembled. The sea of clouds faded in gold and began to burn, forming a black-red flame. In the boundless sea of fire, everyone except the hairy boy began to scold, roar, scream, distort their faces, grow fangs, and suddenly turn into monsters. The hairy boy surrounded by monsters can't do anything but tremble.

Tu Shi took a deep breath, drew his sword, and slashed horizontally. Thousands of zhang of sword qi erupted on the blade, and its aura was so majestic that not only the convenience store was completely wiped out, but even a large sea of fire in front of him was reduced to nothing.

In the next moment, however, the flames were rekindled, and they became more and more intense. Tu Shi's clothes, hair and skin were all ignited, and the intense pain came from all over his body, causing him to shrink into a ball. The sword melted into molten iron, and the hilt stuck to his skin. The illusion is a double-edged sword, and even the pain can be realistically simulated, but it can't kill Tu Shi, so that he can't survive or die now!

Extinguished!!

Tu Shi screamed wildly, the flames dispersed, the light disappeared, and the five fingers around him could not be seen.

"It's ridiculous to think you can do anything." Tu Shi wanted to laugh very much, but the corners of his mouth were disobedient and kept going down. I thought I had forgotten the old things that I had forgotten a long time ago, and as soon as they appeared, I made a mess of myself, and it seems that my psychological tolerance has not grown.

This unknowingly ill-known illusion is so annoying. I was listening to the scriptures in a good way, why should I waste time in the illusion?

Well?

What am I doing?

I'm listening to Master You's lecture...... It is about the lower part of "Taishang Lingbao Five Runic Order" "True Source Righteousness".

Where's the chanting?!

As soon as Tu Shi had this thought, he heard a clear voice coming from nothingness:

"The shape of heaven and earth is like an egg. Within the Liuhe, it is as round as a coffin. ”

The golden smoke reappeared, condensed into a sphere! Because there was no reference, Tu Shi didn't know how big the sphere was, but intuitively thought that it was a newborn star!

Was this text a fantasy?

Definitely not! This is the first time I have heard the "True Source Righteousness", how can I create the scriptures? Even if students write essays, they have to make a draft, where do they come when they open their mouths, I really think that everyone is Cao Zhi? In other words, this text is something that really exists, the only "reality" in the illusion!

"The sun and the moon haunt and run above the day and under the earth. Up and down things, like a flywheel. The east gives birth to the west, and the west gives birth to the east. ”

The sun and moon are born to the sound of chanting, and they revolve around the planet very ideally!

Tu Shi's heart sank. He blessed his soul, and finally found a way out of the illusion: since there is omnipotence in the illusion, he must find something that is really powerless-

He didn't know how to create the scriptures!!

"Between the day, day and night, after the winter solstice, the sun rises in the south and in the north. After the summer solstice, the sun rises from north to south. Winter nights are summer days. Summer night is winter day. During the year, depending on the cold and summer. ”

There is climate change on the planet, and it can be seen with the naked eye that there are storms and clouds on it, and there are thousands of miles of oceans, but it is none of Tu Shi's business!

System Prompt: You've exited Mirage.

This time he suppressed the demons in his heart.

The sea of golden clouds thinned out, and he saw himself. It was a wonderful feeling, it was the most familiar body, but it brought him a sense of freshness. He found that his soul had no weight at all, and that as soon as his mind moved, it would move with it, so he excitedly circled around his body. His body was sitting cross-legged on the futon, sitting opposite the master. The master glanced over and bowed slightly, as if in affirmation.

Since souls have no weight, do they have no substance?

Tu Shi had a whim to see if he could directly pass through the wall. Seeing that the master did not object, his spirit floated towards the door and through the panel. More than a dozen bright sword lights suddenly appeared in his field of vision! He was startled, his soul drifted back, and then he realized that there were many "himself" dancing with swords! These "self" are made up of golden points of light, which are actually the smoke of "Seeking Dragons in the Sea of Clouds", and their faces are blurred, but they are dressed exactly like themselves, like clones. The clones are also weightless like souls, stepping on the air of the atrium, practicing the "Nine Mouths and Eight Methods" over and over again in the moonlight, tirelessly.

How did these clones come about?

Haiqing Zhenren's voice came from behind him: "Your master Zuo said that the combination of 'meaning' and 'qi' is 'potential'. When you close your eyes and think about it with me, you practice swordsmanship in your heart, and your mind is reflected outside, and you combine it with the smoke of 'Seeking the Dragon in the Sea of Clouds', and these illusions are accomplished. ”

So, every time I wander away while listening to the scriptures and simulate sword practice in my mind, I will create a large number of illusory selves? No wonder Master Zuo exempted me from practicing the sword a hundred times every time, it turned out that he only needed to see if there was any illusion to know if I was lazy! So Master Right also knew that I was distracted, so he exerted mana when chanting the scriptures to force me to memorize the scriptures? Damn, the two masters are not stupid!

This time, Tu Shi looked at many "himself" and saw his own shortcomings from the perspective of a bystander, such as the sword stabbing slowly, or the sword slashing crookedly, and so on. I have to say that the mind is one of the most wonderful things, he just felt that he couldn't practice swordsmanship at home, and the illusion of practicing swordsmanship over there had immediately made synchronous adjustments, corrected mistakes, and made sword moves more perfect, until he couldn't find any mistakes himself. More than a dozen illusions have used the highest level of skills in Tu Shi's current realm, and the movements are smooth and rhythmic, which makes Tu Shi feel that it is a visual enjoyment.

However, he soon felt dizzy and subconsciously floated back into the room, his soul soaked in the golden smoke to feel comfortable.

"You haven't cultivated into a primordial god, and without the help of 'Seeking the Dragon in the Sea of Clouds', your soul and body can't be separated for too long, otherwise your yin soul will be damaged." Master Right paused and said, "What matters is not 'what you can do', but 'what you are doing'. ”

Tu Shi chewed on this sentence and nodded heavily.