Chapter 1620: By mistake (2/2)

Cheng Xuansu asked in a low voice, ”All master refiners have their own tools and magic weapons.”

”Professor Rod needs any magic weapon, you can find someone to help him get it.”

Cui Lingfeng sat down opposite Li Yao with a majestic sword, looking motionless, ”But Professor Rod must stay here and can't leave my sight for a second, so as not to be assaulted on his idea.”

”It doesn't matter.”

Li Yao glanced at Cheng Xuansu, waved his hand, ”The ultra-micro engraving knives I used to be used in such a large-scale polygraph are not needed, so he helped me prepare the supporting maintenance of this polygraph. And testing tools are just fine.

”Yes!”

Cheng Xuansu nodded heavily, like a folded knife.

Li Yao got five jade slips and studied it pretentiously for half an hour.

For the precious half an hour, Chairperson Cui, who should be able to deal with everything, has been sitting opposite him calmly, with a meaningful gaze sweeping over every staff member in the secret room from time to time.

If there is really a cultivator hidden here, it is really necessary to be seen by his eyes!

After half an hour, Li Yao estimated that the time was almost up, and nodded to Cui Lingfeng, moved his ten fingers, and started to test the polygraph in full view.

The magic weapon of the polygraph is regarded as an ”old friend” with him. I think he used the weakness of an ancient polygraph ”Xintai” ingeniously on Cheorwon to expose the conspiracy of the Palace of Longevity. , Quelling the internal strife on the Tieryuan Star and even the conflict between the Tieryuan people and the Flying Star people.

At that time, the ”Xinxintai” was exaggerated so that it was a hundred-thirty-five-hundred spirit, and it seemed that there was no lie that could evade its judgment.

But Li Yao now knows that the so-called ”polygraph” or ”heart-asking station” is nothing more than a very sophisticated magic weapon. It also has its flaws and weaknesses. As long as the level is high enough and certain skills are mastered, there is a chance. Get around it.

Even the most advanced polygraph has an accuracy rate of 99%, but it is impossible to be accurate.

And if you move some hands and feet inside the polygraph, the result is even more unpredictable.

Li Yao held his breath and recalled Professor Rod’s technique of refining the instrument. He gently disassembled the arc-shaped shell of the polygraph, exposing the more precise components inside than the clock, and wisps of divine thought sneaked into it like light smoke. There is a slow flow between the pieces and each talisman array.

Everyone stared at him intently, his hands!

Suddenly, Li Yao's hands were fixed, and then his eyes were fixed, his eyebrows were towering, his mouth was muttering, and from the deepest part of the polygraph, he wrapped his divine mind and slowly took out a fingernail size. The chip was held in the palm of the hand and studied carefully for a long time.

”The polygraph seems to be ok.”

Li Yao said to Cui Lingfeng, ”On this chip that controls the sensitivity of the polygraph, there is an extra remote control rune array.”

”Oh?”

Cui Lingfeng's face was expressionless, and he did not show any expression of surprise or doubt, ”Remote control what?”

”It can remotely receive an extremely weak spirit, the sensitivity of a remote polygraph.”

Li Yao explained, “I have dabbled in some magic weapons such as polygraph and meditation in the past. The principles of these magic weapons are similar, or they are based on the changes in the human body’s heartbeat, respiration, blood flow rate, and facial muscles. Parameters for comparison-when ordinary people tell the truth and lies, there are always some differences in various physiological parameters, such as rapid breathing and heartbeat, pore contraction, pupil dilation, and so on.”

”However, for the strong who can precisely control physiological parameters, this kind of polygraph is very easy to fool.”

”Another way is to scan his brain waves to monitor which part of the brain is the most active when he is speaking.”

”Generally speaking, when we are telling the truth, especially when recalling some past experiences, we will mobilize cells in the memory area of ​​the brain. When lying and require creativity and new ideas, we mobilize a different area-the brain. Different active areas have different brain waves, so you can judge the true and false.”

”This polygraph uses the above two principles at the same time, and the sensitivity of each sensing element, chip and rune array is extremely high, because it must be used to deal with the strongest brain and the strongest soul. These people's brains are solid fortresses, extremely difficult to break!”

”So, it only needs a very weak divine mind that will never be noticed, and its sensitivity can be increased tenfold, or reduced to one-tenth.”

Cui Lingfeng narrowed his eyes: ”So what?”

Li Yaodao: ”If its sensitivity is increased tenfold, even if Captain Tang is telling the truth, if the brain waves are extremely amplified, it may be regarded as a lie; if the sensitivity is reduced to one-tenth, it will become a lie. A dull low-level polygraph, a master like Captain Tang can easily fool it.”