A person's nerve reaction speed can be roughly divided into two parts.
The first part is the instinctive reaction, composed of a person's perception of the outside world and muscle memory, which can be collectively referred to as intuition.
In a person's daily life, from small things like cutting vegetables with a kitchen knife without cutting the chopping board, or writing with a pen without piercing the paper, to big things like being punched and instinctively taking a step back to dodge or subconsciously throwing a punch in retaliation, all fall into this category.
The principle of intuition is that intelligent creatures accumulate muscle memory through years of learning and training, and then make subconscious judgments based on the perception of the outside world provided by the five senses.
It has the advantages of occupying less brain computing power and reacting quickly.
Sasuke's previous effortless dodging of the overwhelming projectiles was also based on this principle.
His Sharingan provided sufficiently powerful dynamic vision, allowing him to subconsciously calculate the final landing point of those projectiles after a glance at their flight paths. Coupled with his powerful body speed, he could naturally avoid those projectiles with ease, as if he could predict them.
The second part is the subjective reaction part of a person, which can be called thinking ability.
That is, a person's perception of the outside world receives information, which is fed back to the brain, then thought and calculated to produce a result, and then the body executes this result.
The advantage is that, with enough reference information, one can calculate the result in advance when starting to do something, and be clear about the results in daily life and combat.
The disadvantage is that the reaction is slow, and a large amount of thinking and calculation can easily overload the brain, which will greatly consume the body's energy reserves.
Therefore, most ninja training involves constantly strengthening one's intuition, supplemented by a small amount of thinking, so that one can make the most correct decisions without thinking in battle, in order to ensure one's survival.
But the fact is that a person's intuition and subjective reaction ability are never independent, but complementary.
If both intuition and subjective reaction ability are strong, it will naturally bring a stronger nerve reflex speed, and it can also drive the brain to transform and increase intelligence in the process of using the brain extensively.
Naruto's training is to strengthen his subjective reaction ability on the basis of developing his intuition.
The Kagura Mind's Eye and Sage Mode provide the ability to perceive the outside world, and then the subjective consciousness and brain subconscious accumulate and calculate the evasion route and the power required. Finally, the body executes the calculation results, ultimately achieving the evasion of all attacks.
At first, Naruto calculated very slowly, which also prevented him from passing this nerve reaction speed training.
But as time passed, his computing power continued to improve, and his calculation methods were constantly optimized, finally enabling him to apply subjective reaction ability in battle.
Thus, today, he finally successfully completed this nerve reaction speed enhancement training.
Such subjective reaction ability, coupled with intuition, is enough to ensure that Naruto can use the Flying Thunder God Technique in battle to deal with any unexpected situation without being countered by the enemy.
According to Naruto's estimation, if one day he can train his subjective reaction ability to be as strong as intuition, or even surpass intuition, then he can truly predict all the enemy's attacks in battle.
Sincerity leads to foreknowledge.
It's nothing more than that.
After listening to Naruto's explanation, Sasuke felt a headache.
"So, to train this subjective reaction ability you mentioned, you need to have a lot of mathematical and physical knowledge, and also have extremely strong computing power, so that you can calculate the information you want within a time unit of seconds?"
Naruto nodded and said, "Calculating the desired result within one second can only be said to be barely qualified. If you really want to apply it to the point of being invincible in actual combat, I think you have to compress the calculation time to within 0.1 seconds at least."
Although that's what he said, Naruto himself hasn't been able to do it. With the help of his brain's subconscious, he was calculating the trajectory of those projectiles in real time, and the delay was about 0.5 seconds.
If he could compress the delay to within 0.1 seconds, he would be able to avoid the attacks of those projectiles with ease even without the Flying Thunder God Technique.
"..." Sasuke.
Never mind, can't do it, goodbye!
Naruto called out to Sasuke, who was turning to leave, and said with a grin, "However, seeing the powerful dynamic vision you displayed just now, I happen to have a Ninjutsu training method that's very suitable for you that I can teach you.
This is a Lightning Release Ninjutsu that's more than ten times stronger than your Kirin attack, the kind that even my Vacuum Domain can't defend against."
Sasuke wasn't happy, but rather a bit wary: "What do you want me to do?"
Instinct told Sasuke that Naruto wasn't harboring good intentions at the moment.
"Take out your right eye and let me use it for a bit, I'll return it after I'm done." Naruto said with a smile.
If someone else had said this to Sasuke, he would have undoubtedly lost his temper, but it was Naruto speaking.
Sasuke carefully looked at Naruto's expression, confirming that he wasn't joking at the moment.
After a moment of silence, he asked, "What do you want to do?"
He had asked Naruto what he wanted to do earlier, but now he was asking what Naruto wanted to do with his eye.
His right eye contained the Infinite Izanagi, was Naruto planning to do something dangerous?
"I want to undo the Reaper Death Seal to release my father's soul, and also retrieve the other half of Kurama. At that time, my soul will be damaged, and I might even die, so I need your eye to activate the Infinite Izanagi to avoid the damage."
"You don't have to worry about taking out your eye causing any irreversible damage, it'll be reattached in three seconds."
Naruto explained his purpose in detail.
He even gestured, showing the action of digging out the eye, putting it back in, and smoothing it over to reconnect the optic nerves.
Sasuke listened to Naruto's detailed explanation of the dangers of the Reaper Death Seal.
After thinking for a moment, he said, "Then there's no need to take out my eye and put it in for you. Although you say there won't be any aftereffects, it will still hurt. I can use the Infinite Izanagi after you use the Reaper Death Seal, when your soul is about to be taken away by the Death God, and it can also save you from death."
"After all, this Pupil Power isn't just for avoiding the threat of death, but for changing unwanted fates. I just need to change your fate of being taken away by the Death God."
"However, the effect of the Infinite Izanagi will ultimately be reduced when used on others. After avoiding death, the damage to the soul may not be erased. If that's the case, can I use this Reaper Death Seal?"
"If I were to use it, then after achieving what you said, I wouldn't be injured either, at most I'd just consume a little Pupil Power..."
Sasuke had just said this when he saw Naruto take out a Scroll from somewhere, a smile appearing on his face: "You can use the Reaper Death Seal, the method is written in the Scroll, learn it and we'll start!"
"..." Sasuke.
He had a feeling he'd been tricked.
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