Catherine's words are full of unwillingness, but this unwilling emotion is extremely complicated, maybe for herself, maybe for her father, no one can say clearly.

But she can clearly feel that if she does not find the murderer who killed Dean Darwin, she will never give up.

After a brief pause, Catherine calmed herself before continuing:

"In the past three months, I have not been idle, so I have a good understanding of his research philosophy and process.

The original source of this experiment was his quirky idea that the connection between humans and demons was fundamentally due to a soul match, which is often referred to as 'compatibility with demons'.

And this fit is something that no one can say clearly, and can only be described ambiguously through their own experience.

But what is described can never be empathized, just as you men can never understand what it feels like to have children, so my father took a different approach and turned the soul into something that could be seen.

He developed a device. For the time being, call it the Soul Line. ”

"Wait a minute!" Hearing this, Sherlock's receptivity, no matter how strong, was finally a little tense, he frowned and looked at Catherine, and then asked very solemnly: "You just said that Dean Darwin has developed a device that allows people to see their souls?" ”

"Yes." Catherine said, "Not only human souls, but also demon souls, in fact, at first, I didn't believe it, but it wasn't until I saw the device that I had to admit that I could really see it." ”

A hint of surprise flashed in Sherlock's eyes, he already had a strong curiosity about the unknown, so he immediately leaned forward and asked, "What does a soul look like?" ”

"Lines."

"What?"

"Lines." Catherine repeated: "Actually, I used to think that the soul would be some white phantom or something, but I didn't expect that only four lines could be seen in the soul visual device, at least in the soul visual device, and it looked like a wave floating up and down.

As she spoke, Catherine took out a pen and paper on which she drew a few unremarkable wavy lines for Sherlock.

"That's what it looks like, so the old guy named them after the four pre-opening texts of the Sacred Calendar, namely, α waves, β waves, theta waves, and δ waves."

She also wrote down what the letters looked like. Then continued:

"This is the appearance of the human soul, and the state of the soul of the demon in this device is more violent and dense wave fluctuations, but fortunately there is still a pattern.

In the course of the next numerous experiments, my father discovered that all the contractors and the contract demons they summoned had certain intersections in the ups and downs of their souls.

And the more intersections, the higher the level of the contract between them, some third-level contractors can reach the level of overlapping with their demons every few minutes, and even after inviting some powerful contractors to test, it is found that there is an overlap between them and the demons.

At this point, the term fit has finally been clearly explained.

In fact, at this point, that old guy should have made a pretty significant discovery, and his name is dazzling enough to be celebrated in history for hundreds or thousands of years.

But he was clearly not satisfied with this, and he came up with an even more frantic idea.

That is, he discovered that the frequency of fluctuations of the soul is not the same in different states of mind. So if humans can change their soul lines through training, and then make them overlap with a wild demon, will there be some kind of connection between the two?

Or even. Contracts can be made"

Hearing this, with Sherlock's acceptance, he was silent for two or three seconds, and the surprise in his eyes gradually turned into an exclamation. It should be said that it is amazing!

In his life, he rarely felt this way, when he first met Moriarty, he didn't have such emotions At this moment, he sincerely felt shocked, and then awe of a person's greatness from the bottom of his heart.

Soul Visible!

Artificial Contract!

What a terrible thought

Before the opening of the Holy Calendar, religions had not yet merged, so countless sects spread teachings similar to 'God created human beings and all living beings', but after the gates of hell were opened, human beings did not have time to think about why they came from, but only pondered how to reproduce.

But according to the theory of the time, Professor Darwin's idea is undoubtedly breaking the prison that God set up when he created creatures!

Fish shouldn't be able to fly, camels shouldn't be able to dive, flowers shouldn't be able to talk, and humans shouldn't be able to enslave demons casually!

What would happen if the experiment did succeed?

Find a random person, and after some kind of training, you can make him have a contractual relationship with a third-order great demon?

Isn't the front line of the Gates of Hell full of third-order contractors!

In the future, whatever the battle, if you make tens of thousands of demons at every turn, then wouldn't the human race be able to directly kill this group of monsters from the other world back into hell, and the human race has wanted to close the gates of hell for centuries, wouldn't it be easy to realize it?

No!

That's it, then close the door of the, let the demons in hell pour out, and human beings can unscrupulously turn these demons into their own laborers, one for each person, and summon them to work if they have nothing to do, just like the group of workers in the factory now.

The more he thought about it, the more shocked Sherlock became, and even felt that Professor Darwin's research had a great chance of changing the future of the entire human world!

So he asked with great caution:

"The study. Did it really work? ”

Catherine hesitated, and although she hated her father, she knew what the success of this experiment meant, so she said with some regret:

"I don't know if this experiment did use a lot of manpower from the School of Life Sciences, but everyone was almost only responsible for their own sections, and all the data was finally gathered into my father's exclusive laboratory, which led to the process of the whole experiment, only he knows.

However, I think he must have succeeded, because if the results of the experiment did not meet his expectations, then he would not be able to rush to show the results.

And, just now I read his diary. ”

As she spoke, Catherine took out a notebook with a black cover:

"This is the old guy's diary, locked in that safe all the time, thank you for it."

"You're welcome." Sherlock extinguished the cigarette in his hand, "Is there any important information in there?" ”

"Hundreds of passwords, I tried them for hours, and I actually just started reading them, but if you look at the above records" Speaking of this, Catherine subconsciously took a deep breath, as if this was the only way to give herself the courage to say the next words:

According to the records in the diary, in fact, as early as two and a half years ago, my father had successfully used the method he developed.

I've contracted a third-order archdemon."

(End of chapter)