"Iruka!" Although Hong's face was not very good, as the person closest to Iruka, she obviously saw a mocking look in the big boy's eyes. Pen & Fun & Pavilion www.biquge.info

"Don't scare Yakumo!"

"Okay, okay!"

Iruka smiled and waved her hand as she continued her lesson.

"So, a long time ago, a great man named Descartes tried to explain the problem, but the first problem he encountered was what was certain and must be true and true!"

Yakumo opened her eyes, her big teary eyes popped out at once, and she vaguely felt that what Iruka was talking about below was something very precious to her, so she asked the question in her heart.

"For ...... Why? ”

"For once a fact is found which is regarded as infallible, and from which constitutes a collection of facts, these facts will become the most important fundamental axiom for the study of natural philosophy by the Cartesian sage."

Iruka looked at Yakumo's still confused eyes and continued.

"Then, from this basic axiom, we can make valid reasoning, and finally from the irrefutable set of facts as the starting point, we can apply these rules of reasoning to deduce the tangible facts!"

"Oh!"

Yakumo nodded as if he didn't understand, but the red brows on the side furrowed.

"And then he couldn't find the most basic axiom?"

"It's a shame that almost any proposition describing this real world is dubious in some way!"

"Isn't 1+1 necessarily equal to 2?"

Iruka was very pleased with Red's question.

"Red you are such a genius, the most popular answer to this basic axiom is that logical truth and mathematical truth are the most reliable!"

"But unfortunately, if there really is a powerful illusion powerhouse that is unmatched, if he can deceive you in the physical world, what power can stop him from deceiving you in the field of mathematics as well?"

Iruka clapped her hands first, then shrugged her shoulders a little helplessly.

"1+1 may be equal to 3 or 11, but this god-like powerhouse uses an extremely sophisticated method to apply illusion to your brain, making you mistakenly think that it is 2, and making you believe that 1+1=2, and allowing you to prove him in many ways!"

"You have no way to prove it!"

Hong's body also began to crumble, for a strong illusion person, the establishment of a worldview is an extremely important thing, a little worldview begins to collapse, then all her strength will be like a house that has been corroded from its foundation, and it will collapse in an instant.

"Again, you can't argue with that! Since you can't falsify, then it's possible that it exists! ”

"Wow!"

A mouthful of red blood spat out, and Yakumo, who was watching from the side, trembled even more, and Iruka saw that the three views of the two had almost been destroyed, and hurriedly spoke.

"But!"

"But!?" *2

Sunset Red and Kurama Yakumo's eyes lit up instantly.

"But if it were only to this extent, our Descartes would not be called the Great Sage!"

Iruka began to talk about the greatest discovery of Descartes, who is known as the "father of modern philosophy"!

"Descartes had some interesting ideas, and he noticed that imagination has a limit!"

"Clams?"

Red and Yakumo don't know why they suddenly started talking about imagination.

In other words, infinite imagination does not exist in the world, even if it is a god-like illusion powerhouse, his imagination still has a limit! Avatars in dreams or surrealist responses are based on real objects! ”

Iruka turned on the system's built-in skills to guide the two beautiful girls down their minds.

"For example, when you are painting, Yakumo, even if you are talking about the most bizarre monsters, you can't invent new characteristics for these monsters in one aspect!"

"The tailed beasts created by the Six Dao Immortals, one tail is a tanuki made of sand, the second tail is a cat demon, the third tail is a turtle facing the armor, etc., etc., or the centaurs, unicorns, sphinxes and other creatures that do not exist in the world that Yakumo drew are all pieced together by the Six Paths Immortals or Yakumo yourself with what you already know! Truth be told, judging by these similarities, there really is nothing remarkable about the human imagination, and these monsters are not as strange as kangaroos and starfish! ”

Yakumo couldn't help but nodded: "Kangaroo? What's that? ”

"Don't worry!" Iruka snorted and continued, "So, that sage affirmed one thing, that illusion powerhouse like a god, his imagination must also have a limit! ”

"For example, oh said that the strong man designed the image of a dog in the [Brain in the Tank], then we have reason to think that in the world outside the cultivation tank, even if there is no real thing like a dog, but the eyes, fur, paws and other things must also exist objectively!"

Speaking of this, Iruka paused for a moment and continued:

"Another example is color!"

Yakumo and Red became more focused.

"Even in the most bizarre paintings, the colors in the paintings are the most real and unreal! Therefore, there is reason to believe that even if we are in the illusion of this powerful man, the color [red] that appears in front of us must be real in the real world! ”

Yakumo and Red's eyes began to get brighter and brighter.

"Because if the real world is made of black and white, there is no concept of color at all, and even the most creative powerhouse will find it difficult to create such a thing as color in illusion, because he can't understand what color is!"

Yakumo and Red nodded repeatedly.

"Suppose you are wondering about the reality of your mind, then you are doubting [you are doubting] this thing! In this way, you may be deceived in many ways, but there must be at least one mind that is being blinded! ”

Iruka habitually cleared her throat.

"So, the great sage came up with his most famous conclusion—I think I am here!"

Bang! Like a flash of lightning flashing across the sky, Yakumo and Red felt as if their brains had been struck by a bolt of lightning when Iruka spat out these words!

What they have learned, what they have understood, what they have pondered, at this moment, these knowledge and experience are like the most fertile nutrients and the most nourishing rain, and their hearts are like a small seed.

Originally, although nutrients and rain formed a world of illusion, because the seed of the mind did not sprout, the whole world of the mind seemed so empty and pale.

But from this moment on, it was completely different, after a burst of spring thunder, the seeds finally began to take root and sprout, absorbing the nutrients around them, and their spiritual world was no longer a source of water, a tree without roots!

The light of red, green, and blue appeared around the two beauties, and the three primary colors of optical definition were intertwined to create one colorful world after another.

Iruka nodded with satisfaction, and then began to seal his hands with an extremely rare hand, using a large-scale sealing ninjutsu to seal the strange scenery that happened in this training ground.

Then, Iruka smiled lightly and turned around and walked in the direction of the Konoha Building, although he left a shadow clone to handle official business in the position of the Hokage, but there were some important things that he could do by himself to seem more relieved.

Iruka seemed to have suddenly thought of something, and once again cast a worried gaze in the direction of the Land of Rain.

"I said, Miss Tsunade, you can blow up the puppet, don't kill Nagato! It's hard to find such a good coolie! ”

Talking to herself, Iruka sighed.

"Why did you just use this trick! Now I can only hope that that guy from Jiraiya can stop some Tsunade, otherwise it will be troublesome! ”