"Games?"

Arimia didn't quite understand, but sat down across from Reiner, a card game she had only been exposed to the rules but had never actually played.

"Rest assured, we won't use this original rule, but the one I made."

Reiner shuffled the cards, put one card face up, placed it in Elimia's hand, and placed another card on the table.

"Now we stipulate that if the cards on the table are the same color as the cards in your hand, then you win, and if they are the opposite color, then I win."

Arimia nodded as if she didn't understand, and then turned over the card in front of her at Reiner's motion, which was a red card.

At the same time, Reiner turned over the cards in front of him, not red, but black.

The card only comes in two colors, black and red, so Elemia should theoretically have a 50% chance of winning.

But seven times in a row, Elemia lost.

Every time, when Arymia turned over the cards in front of her, Reiner always turned over the cards of the opposite color, much to Arymia's chagrin.

"Even if it's luck, it's unreasonable!"

Arimia seems to have become so immersed in the game that she has forgotten that they are actually discussing academic issues.

"Then let's do it another way, if the colors are different, it's your victory, and the same color is my win."

Reiner smiled and didn't say anything more.

Arimia thought about it, and it seemed reasonable, so she nodded in agreement.

I saw Reiner deal two more cards, one of which was a black card opened by Elimia, and then, Reiner turned over the card in front of him, which was also a black card.

Elemia lost again.

Seven times in a row, each time it was a card of the same color, and Arimia lost again.

"It's not a common sense of magic at all, Reiner, you must be cheating!"

Arimia put down her card and blamed Reiner.

"Hehe, I'm cheating."

Reiner's answer choked up on Elimia, how could there be a dealer who would admit that he had cheated so easily?

"So, Arymia, can you see how I cheated?"

"Uh...... The order of the cards was determined in advance when the cards were shuffled? ”

Arimia was a little confused by this question, and hesitated for a moment before giving an answer.

"That's the problem."

Reiner smiled and continued.

"If we think of each card in the game as a particle in a quantum system, with red and black as its spin state, then what we simulated earlier is actually a manifestation of quantum entanglement."

He saw that Arymia didn't understand too much, so he went on to explain.

"The phenomenon of quantum entanglement shows that when we know the state of one particle in a system of two quanta entangled with each other, we can know the state of the other particle, just as in two games, we know the color of one of the cards and the color of the other."

"So, in fact, no matter how you played just now, you lost......"

Arimia seemed to be still struggling with the outcome of the game, and said with some dissatisfaction.

"It can be understood in this way, there is no doubt that in the game just now, I cheated, which is also the view of the mages on quantum entanglement, that is, in quantum entanglement, there must be a magic element that is used to describe the quantum state, in short, the act of cheating should also be included in the theory, we allow quantum entanglement to cheat, but quantum theory must make it clear how it cheats."

Reiner shrugged.

"Lord Braggs and Lord Alberton believe that the evil dealer has determined the order of the cards before the game begins, that is, in the phenomenon of quantum entanglement, the state of two particles is determined at the beginning, and our observations are nothing more than observations of what has already happened."

At the moment of separation, the spin state of the two particles has been determined, and this information is transmitted along with their separation, so the spin state of the observed particle is actually observing what has already happened, so there is no limit to the speed of light, or in other words, the speed at which the observer knows the information is indeed below the speed of light.

This is a conclusion based on general relativity, which is more common sense from the point of view of common sense, and real determinism plays an important role in it.

"In this speculation, the state of the particle is determined, it has been determined from the beginning, the particle itself is an objectively existing thing, and its spin state is also objectively real."

Reiner said with a slight sigh, then looked at Arymia again.

"But there's another conjecture, another way to cheat."

He took out two cards, one red and one black, and covered the surface of the cards with magic, instantly turning both cards into the same red.

"The dealer actually drew two cards at random, and even he didn't know what the color of those cards were, but he had a special way of changing the color the moment he turned over the cards to win."

"How is this possible......"

Arimia blurted out subconsciously, but soon, she noticed the problem.

Because this is exactly the embodiment of the wave function collapse in quantum theory, the observer effect.

"At the moment when the cards are turned over, it is equivalent to the moment when the mages measure the particle, in which the wave function of the quantum system collapses due to observation, and the state of the particle is determined, thus affecting the state of another particle entangled with it, which is the process described in quantum theory."

Reiner said, placing two cards on the table, one black and one red.

"This is the collision between the classical magic system and the quantum magic system, and what is hidden behind it is the existence or non-existence of real determinism."

The classical system of magic holds that the existence of matter is objectively real, and that matter retains its original state regardless of whether the observer exists or not, and that although the collapse of the wave function is caused by the observer's observational behavior, the result of the collapse should have been determined beforehand, rather than the observation affecting the result.

This can explain many problems at the same speed of light, but it is contrary to quantum theory.

In the quantum magic system, observation is a very important behavior, and the particle state of the quantum system is determined based on observation, which is even beyond the speed of light, contrary to the theory of cause and effect.

"The question now for mages is which side is the factual explanation, the determinism of objective reality or the ethereal quantum theory."

Reiner said helplessly.

"Although I am more in favor of the latter, it is also necessary to come up with specific experiments to verify it."