There were two people inside the door, one of them was the fat middle-aged man who had never had a name but seemed to have a good power. At this moment, he was sitting behind a desk, squinting his eyes, as if he was enjoying the hard-earned rest time.

As for the other one, Lu Yuan had never seen it. He was a man with a tall figure and a large proportion of facial features, which made him show a sinister temperament. He was standing in the corner of the room and staring at Lu Yuan with a smile.

After hearing the door was opened, the middle-aged man sat upright.

"You're coming faster than you thought," he said.

"It's already slow enough. I've been delayed for three days on the road. It's almost a day since our world has passed. I'm very anxious." Lu Yuan said straight to the point: "Where is my sister?"

Along the way, what Lu Yuan was most concerned about was Ali. He had not eaten or drunk for nearly five days. Fortunately, Ali's IDE was better than ordinary people, otherwise she would definitely not be able to hold on for such a long time.

"Don't worry, she's safe." The middle-aged man said, and then he lit a few randomly on the desk in front of him. A hologram appeared directly above the table. In the picture, there was a place like an operating room. A girl was lying on the operating table, closing her eyes. Looking closely, you could see that her eyelashes were trembling slightly. Most people would have this behavior before they woke up while they were asleep.

Around the operating table are many slender probes that are carefully helping them restore their muscle vitality.

"In your world, it may have just been a few days, but you left once. It has been about 7 months since I don't know much about your existence in different world lines. How to calculate vital signs, so I ask my friend to protect her." As he said that, he pointed to the tall and thin man next to him: "I don't want you to give you a body when you come back, but the side effect is that this little girl has been sleeping for several months, and it takes some time to recover her muscles."

Lu Yuan glanced at the evil man with some curiosity.

"Hello, you can call me Dos." The man still smiled faintly.

"Lu Yuan." Lu Yuan also politely issued his name, although the other party should have known it a long time ago.

Sure enough, Dos nodded: "You are a very interesting person."

"?" Lu Yuan didn't say anything.

"In this story, you shouldn't have any plot, but now the foundation's danger is in your hands. This is very interesting, and what's more interesting is that you are still restless in your world."

Lu Yuan frowned even deeper: "So...what are you talking about?" he muttered.

"Do you know Schrödinger?" Dos suddenly changed the subject and said such a sentence without any beginning or end.

"Schrödinger? Is this the name?" Lu Yuan was also confused. In his world, the name Schrödinger had long been forgotten by people. After all, in the years when the Ark existed, productivity was replaced by machinery, and people's experiences were replaced by virtual worldviews. Schrödinger's fuzzy school of philosophical theories are no longer paid attention to by people.

Dos' smile became stronger and stronger: "Yes, Schrödinger is an Austrian. I don't know if there is still 'Austria' in your world. In short, you can regard this person as a philosopher with some problems in your mind."

"Oh." Lu Yuan obviously had no interest in this topic, but this guy was also a person who "protected" Ali, so he was still listening to the other party's nagging politely for the time being.

"Schrödinger's most famous theory is chaos. This thing is called [quantum mechanics] by many people. To put it bluntly, it is 'that I don't know how to explain it at all', and it can all be attributed to quantum mechanics."

"Oh, because no one can understand, so you can say anything, right?" Lu Yuan painted a groove.

"That's about that." Dos continued: "He once proposed a hypothetical experiment. To put it simply, it is to put a cat in a poisonous box. After 10 minutes, the poison has a 50% chance of killing the cat, and another 50% chance of allowing the cat to survive. So, do you think, at the moment when the 10 minutes arrive, will the cat die or live?"

"Ah?" Lu Yuan grunted depressedly, with an expression of 'What's wrong with this'.

"Hahaha, this is the interesting thing, because from a physics perspective, this cat may only be one of life or death, and must be one of them. However, people outside the box can only determine which one it is when they open the box. Therefore, before the box is opened, the cat inside the box is chaos."

"Yeah, thank you for telling such a meaningful knowledge point." Lu Yuan signaled impatiently, and he was not interested in this topic.

"So I was thinking that Yao Xiaoxin is not necessarily the protagonist. Where the ending of the story is pointed can only be determined when the box is opened."

Lu Yuan's body tensed a little, and he looked at Dos with an incredible look.

"Yao Xiaoxin??How did you know this name?"

He was indeed shocked enough, because this is the world of the Ark, and people in this world are difficult to detect even the existence of [Ark] itself, let alone the world outside the Ark, of course, let alone know Yao Xiaoxin.

"Hahaha, this expression is very good. You must be thinking 'Who am I?' right? Tsk tsk, this question is quite complicated. I'll tell you if I have time. I just want you to realize something."

"What's the matter?" Lu Yuan asked subconsciously.

"Box. Didn't you find that the ark is like a box? Outside the box, there must be an observer. Most of the time, you players act as observers. Without the observer, the dungeon will not exist... Although we still have our own lives, time is still passing, and society is still changing, we still do not exist."

Lu Yuan tried to keep up with Dos's idea, but like the cat that existed in chaos between life and death, it was difficult for him to understand the sentence "We still don't exist".

"What you mean is that only when the so-called [people outside the box] are observing this world, can this world be considered to exist, right?" Lu Yuan asked tentatively.

Dos nodded with satisfaction.

"It's already great that you can understand this level." He smiled, "So who do you think is observing you?"

Lu Yuan's fists clenched tightly at this moment. What's funny is that he didn't seem to know why he clenched tightly. What was going on, which made him so nervous.

"Do you think someone is staring at you?"

"Of course, you're staring at me."
Chapter completed!