Chapter 199: Found a Reason Not to Let Her Go (3 more updates)-1

This room seemed somewhat familiar.

The polygraph.

Gu Yi'an had seen it quite a few times, but it was her first time to be the subject herself.

Seeing the scene here, she couldn't help but smile bitterly.

If it were an ordinary person, of course, there would be no way to escape a polygraph. But for her, for those who had been trained, the polygraph was completely useless.

Actually, it's quite simple to understand if explained straightforwardly.

Many instruments of the polygraph are linked to a person's body, measuring the person's heartbeat, pulse, blood pressure, and so on.

First, through a set of simple questions, like asking the subject's name, gender, age, etc., the subject tells the truth, and through this, the subject's physiological baseline is determined.