If you look at a person's head from the side, it is like an exaggerated question mark. Anti-bone can also refer to a person with a particularly prominent forehead, called frontal anti-bone. In life, some people have obvious occipital protrusion, while others have no obvious occipital protrusion. Through the back of a person's head, we can find out whether a person has anti-bone.
In ancient feudal society, anti-bone refers to heresy with rebellious spirit, generally speaking, it refers to disloyal and unjust people. During the ancient Three Kingdoms period, Zhuge Liang discovered that Wei Yan was a man with an anti-bone. After observing his behavior, he found that Wei Yan was an unfaithful man.
According to what happened later, Wei Yan was loyal to Shu, made a lot of contributions to Shu, and was a hero, but Zhuge Liang killed him in vain. This is because people lack understanding of the nature of things and believe in such mysterious things as superstition. Even in many cases, when making important choices, it will be regarded as a guide.
Extended data
Anti-bone allusion