The direction of one's gaze can, to some extent, imply the truthfulness of their statements. However, without thorough investigation, relying solely on the techniques introduced in this article to make a judgment is clearly not rational. Yet, it would be wrong to say that these techniques are entirely useless. Conduct more tests among people around you, and you will understand the reliability of these techniques. The conclusions in this article are largely based on statistical methods. If the subject being judged is left-handed, simply adjust the conclusions in the opposite direction.